Merge branch 'upstream/master' (4c7de9e8ab) into tools

2026-05-20 02:47:45 +00:00 · 2022-05-30 12:07:07 +02:00
parent c90279e156 4c7de9e8ab
commit f710dc97e2
60 changed files with 2394 additions and 1784 deletions
@@ -5,6 +5,7 @@ on:
      - master
      - tools
      - github_ci
+      - github_ci_armv7
  pull_request:
    branches:
      - master
@@ -19,6 +20,12 @@ jobs:
    strategy:
      matrix:
        config:
+          # set the variable for the required tests:
+          # run_expensive_tests: true
+          # run_32bit_tests: true
+          # run_64bit_tests: true
+          # run_armv8_tests: true
+          # run_armv7_tests: true
          - {
              name: "Ubuntu 20.04 GCC",
              os: ubuntu-20.04,
@@ -34,18 +41,31 @@ jobs:
              os: ubuntu-20.04,
              compiler: clang++,
              comp: clang,
-              run_expensive_tests: false,
              run_32bit_tests: true,
              run_64bit_tests: true,
              shell: 'bash {0}'
            }
+          - {
+              name: "Ubuntu 20.04 NDK armv8",
+              os: ubuntu-20.04,
+              compiler: aarch64-linux-android21-clang++,
+              comp: ndk,
+              run_armv8_tests: true,
+              shell: 'bash {0}'
+            }
+          - {
+              name: "Ubuntu 20.04 NDK armv7",
+              os: ubuntu-20.04,
+              compiler: armv7a-linux-androideabi21-clang++,
+              comp: ndk,
+              run_armv7_tests: true,
+              shell: 'bash {0}'
+            }
          - {
              name: "MacOS 10.15 Apple Clang",
              os: macos-10.15,
              compiler: clang++,
              comp: clang,
-              run_expensive_tests: false,
-              run_32bit_tests: false,
              run_64bit_tests: true,
              shell: 'bash {0}'
            }
@@ -54,33 +74,37 @@ jobs:
              os: macos-10.15,
              compiler: g++-10,
              comp: gcc,
-              run_expensive_tests: false,
-              run_32bit_tests: false,
              run_64bit_tests: true,
              shell: 'bash {0}'
            }
          - {
-              name: "Windows 2019 Mingw-w64 GCC x86_64",
-              os: windows-2019,
+              name: "Windows 2022 Mingw-w64 GCC x86_64",
+              os: windows-2022,
              compiler: g++,
-              comp: gcc,
-              run_expensive_tests: false,
-              run_32bit_tests: false,
+              comp: mingw,
              run_64bit_tests: true,
              msys_sys: 'mingw64',
-              msys_env: 'x86_64',
+              msys_env: 'x86_64-gcc',
              shell: 'msys2 {0}'
            }
          - {
-              name: "Windows 2019 Mingw-w64 GCC i686",
-              os: windows-2019,
+              name: "Windows 2022 Mingw-w64 GCC i686",
+              os: windows-2022,
              compiler: g++,
-              comp: gcc,
-              run_expensive_tests: false,
+              comp: mingw,
              run_32bit_tests: true,
-              run_64bit_tests: false,
              msys_sys: 'mingw32',
-              msys_env: 'i686',
+              msys_env: 'i686-gcc',
+              shell: 'msys2 {0}'
+            }
+          - {
+              name: "Windows 2022 Mingw-w64 Clang x86_64",
+              os: windows-2022,
+              compiler: clang++,
+              comp: clang,
+              run_64bit_tests: true,
+              msys_sys: 'clang64',
+              msys_env: 'clang-x86_64-clang',
              shell: 'msys2 {0}'
            }

@@ -97,14 +121,14 @@ jobs:
        if: runner.os == 'Linux'
        run: |
          sudo apt update
-          sudo apt install expect valgrind g++-multilib
+          sudo apt install expect valgrind g++-multilib qemu-user

      - name: Setup msys and install required packages
        if: runner.os == 'Windows'
        uses: msys2/setup-msys2@v2
        with:
          msystem: ${{matrix.config.msys_sys}}
-          install: mingw-w64-${{matrix.config.msys_env}}-gcc make git expect
+          install: mingw-w64-${{matrix.config.msys_env}} make git expect

      - name: Download the used network from the fishtest framework
        run: |
@@ -117,6 +141,7 @@ jobs:

      - name: Check compiler
        run: |
+          export PATH=$PATH:$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin
          $COMPILER -v

      - name: Test help target
@@ -238,6 +263,37 @@ jobs:
          make clean
          make -j2 ARCH=x86-64-vnni256 build

+      # armv8 tests
+
+      - name: Test armv8 build
+        if: ${{ matrix.config.run_armv8_tests }}
+        run: |
+          export PATH=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH
+          export LDFLAGS="-static -Wno-unused-command-line-argument"
+          make clean
+          make -j2 ARCH=armv8 build
+          ../tests/signature.sh $benchref
+
+      # armv7 tests
+
+      - name: Test armv7 build
+        if: ${{ matrix.config.run_armv7_tests }}
+        run: |
+          export PATH=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH
+          export LDFLAGS="-static -Wno-unused-command-line-argument"
+          make clean
+          make -j2 ARCH=armv7 build
+          ../tests/signature.sh $benchref
+
+      - name: Test armv7-neon build
+        if: ${{ matrix.config.run_armv7_tests }}
+        run: |
+          export PATH=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH
+          export LDFLAGS="-static -Wno-unused-command-line-argument"
+          make clean
+          make -j2 ARCH=armv7-neon build
+          ../tests/signature.sh $benchref
+
      # Other tests

      - name: Check perft and search reproducibility
@@ -1,4 +1,4 @@
-# List of authors for Stockfish, as of June 14, 2021
+# List of authors for Stockfish

 # Founders of the Stockfish project and fishtest infrastructure
 Tord Romstad (romstad)
@@ -21,6 +21,7 @@ Alexander Kure
 Alexander Pagel (Lolligerhans)
 Alfredo Menezes (lonfom169)
 Ali AlZhrani (Cooffe)
+Andrei Vetrov (proukornew)
 Andrew Grant (AndyGrant)
 Andrey Neporada (nepal)
 Andy Duplain
@@ -30,6 +31,7 @@ Arjun Temurnikar
 Artem Solopiy (EntityFX)
 Auguste Pop
 Balint Pfliegel
+Ben Chaney (Chaneybenjamini)
 Ben Koshy (BKSpurgeon)
 Bill Henry (VoyagerOne)
 Bojun Guo (noobpwnftw, Nooby)
@@ -53,6 +55,7 @@ DiscanX
 Dominik Schlösser (domschl)
 double-beep
 Douglas Matos Gomes (dsmsgms)
+Dubslow
 Eduardo Cáceres (eduherminio)
 Eelco de Groot (KingDefender)
 Elvin Liu (solarlight2)
@@ -102,6 +105,7 @@ jundery
 Justin Blanchard (UncombedCoconut)
 Kelly Wilson
 Ken Takusagawa
+Kian E (KJE-98)
 kinderchocolate
 Kiran Panditrao (Krgp)
 Kojirion
@@ -122,6 +126,7 @@ marotear
 Matt Ginsberg (mattginsberg)
 Matthew Lai (matthewlai)
 Matthew Sullivan (Matt14916)
+Max A. (Disservin)
 Maxim Molchanov (Maxim)
 Michael An (man)
 Michael Byrne (MichaelB7)
@@ -131,6 +136,7 @@ Michael Whiteley (protonspring)
 Michel Van den Bergh (vdbergh)
 Miguel Lahoz (miguel-l)
 Mikael Bäckman (mbootsector)
+Mike Babigian (Farseer)
 Mira
 Miroslav Fontán (Hexik)
 Moez Jellouli (MJZ1977)
@@ -143,6 +149,7 @@ Nikolay Kostov (NikolayIT)
 Nguyen Pham (nguyenpham)
 Norman Schmidt (FireFather)
 notruck
+Ofek Shochat (OfekShochat, ghostway)
 Ondrej Mosnáček (WOnder93)
 Oskar Werkelin Ahlin
 Pablo Vazquez
@@ -151,6 +158,7 @@ Pascal Romaret
 Pasquale Pigazzini (ppigazzini)
 Patrick Jansen (mibere)
 pellanda
+Peter Schneider (pschneider1968)
 Peter Zsifkovits (CoffeeOne)
 Praveen Kumar Tummala (praveentml)
 Rahul Dsilva (silversolver1)
@@ -163,6 +171,7 @@ Rodrigo Exterckötter Tjäder
 Ron Britvich (Britvich)
 Ronald de Man (syzygy1, syzygy)
 rqs
+Rui Coelho (ruicoelhopedro)
 Ryan Schmitt
 Ryan Takker
 Sami Kiminki (skiminki)
@@ -186,11 +195,13 @@ Tom Truscott
 Tom Vijlbrief (tomtor)
 Tomasz Sobczyk (Sopel97)
 Torsten Franz (torfranz, tfranzer)
+Torsten Hellwig (Torom)
 Tracey Emery (basepr1me)
 tttak
 Unai Corzo (unaiic)
 Uri Blass (uriblass)
 Vince Negri (cuddlestmonkey)
+xefoci7612
 zz4032


@@ -1,7 +1,6 @@
 ## Overview

 [![Build Status](https://github.com/official-stockfish/Stockfish/actions/workflows/stockfish.yml/badge.svg)](https://github.com/official-stockfish/Stockfish/actions)
-[![Build Status](https://ci.appveyor.com/api/projects/status/github/official-stockfish/Stockfish?branch=master&svg=true)](https://ci.appveyor.com/project/mcostalba/stockfish/branch/master)

 [Stockfish](https://stockfishchess.org) is a free, powerful UCI chess engine
 derived from Glaurung 2.1. Stockfish is not a complete chess program and requires a
@@ -10,24 +9,28 @@ Cute Chess, eboard, Arena, Sigma Chess, Shredder, Chess Partner or Fritz) in ord
 to be used comfortably. Read the documentation for your GUI of choice for information
 about how to use Stockfish with it.

-The Stockfish engine features two evaluation functions for chess, the classical
-evaluation based on handcrafted terms, and the NNUE evaluation based on efficiently
-updatable neural networks. The classical evaluation runs efficiently on almost all
-CPU architectures, while the NNUE evaluation benefits from the vector
-intrinsics available on most CPUs (sse2, avx2, neon, or similar).
-
+The Stockfish engine features two evaluation functions for chess. The efficiently 
+updatable neural network (NNUE) based evaluation is the default and by far the strongest.
+The classical evaluation based on handcrafted terms remains available. The strongest 
+network is integrated in the binary and downloaded automatically during the build process.
+The NNUE evaluation benefits from the vector intrinsics available on most CPUs (sse2, 
+avx2, neon, or similar).

 ## Files

 This distribution of Stockfish consists of the following files:

-  * [Readme.md](https://github.com/official-stockfish/Stockfish/blob/master/README.md), the file you are currently reading.
+  * [README.md](https://github.com/official-stockfish/Stockfish/blob/master/README.md),
+    the file you are currently reading.

-  * [Copying.txt](https://github.com/official-stockfish/Stockfish/blob/master/Copying.txt), a text file containing the GNU General Public License version 3.
+  * [Copying.txt](https://github.com/official-stockfish/Stockfish/blob/master/Copying.txt),
+    a text file containing the GNU General Public License version 3.

-  * [AUTHORS](https://github.com/official-stockfish/Stockfish/blob/master/AUTHORS), a text file with the list of authors for the project
+  * [AUTHORS](https://github.com/official-stockfish/Stockfish/blob/master/AUTHORS), 
+    a text file with the list of authors for the project

-  * [src](https://github.com/official-stockfish/Stockfish/tree/master/src), a subdirectory containing the full source code, including a Makefile
+  * [src](https://github.com/official-stockfish/Stockfish/tree/master/src),
+    a subdirectory containing the full source code, including a Makefile
    that can be used to compile Stockfish on Unix-like systems.

  * a file with the .nnue extension, storing the neural network for the NNUE
@@ -37,7 +40,7 @@ This distribution of Stockfish consists of the following files:

 The Universal Chess Interface (UCI) is a standard protocol used to communicate with
 a chess engine, and is the recommended way to do so for typical graphical user interfaces
-(GUI) or chess tools. Stockfish implements the majority of it options as described
+(GUI) or chess tools. Stockfish implements the majority of its options as described
 in [the UCI protocol](https://www.shredderchess.com/download/div/uci.zip).

 Developers can see the default values for UCI options available in Stockfish by typing
@@ -68,9 +71,9 @@ change them via a chess GUI. This is a list of available UCI options in Stockfis

  * #### EvalFile
    The name of the file of the NNUE evaluation parameters. Depending on the GUI the
-    filename might have to include the full path to the folder/directory that contains the file.
-    Other locations, such as the directory that contains the binary and the working directory,
-    are also searched.
+    filename might have to include the full path to the folder/directory that contains
+    the file. Other locations, such as the directory that contains the binary and the
+    working directory, are also searched.

  * #### UCI_AnalyseMode
    An option handled by your GUI.
@@ -103,7 +106,7 @@ change them via a chess GUI. This is a list of available UCI options in Stockfis
    Example: `C:\tablebases\wdl345;C:\tablebases\wdl6;D:\tablebases\dtz345;D:\tablebases\dtz6`

    It is recommended to store .rtbw files on an SSD. There is no loss in storing
-    the .rtbz files on a regular HD. It is recommended to verify all md5 checksums
+    the .rtbz files on a regular HDD. It is recommended to verify all md5 checksums
    of the downloaded tablebase files (`md5sum -c checksum.md5`) as corruption will
    lead to engine crashes.

@@ -138,8 +141,9 @@ change them via a chess GUI. This is a list of available UCI options in Stockfis
 For developers the following non-standard commands might be of interest, mainly useful for debugging:

  * #### bench *ttSize threads limit fenFile limitType evalType*
-    Performs a standard benchmark using various options. The signature of a version (standard node
-    count) is obtained using all defaults. `bench` is currently `bench 16 1 13 default depth mixed`.
+    Performs a standard benchmark using various options. The signature of a version 
+    (standard node count) is obtained using all defaults. `bench` is currently 
+    `bench 16 1 13 default depth mixed`.

  * #### compiler
    Give information about the compiler and environment used for building a binary.
@@ -210,22 +214,27 @@ on the evaluations of millions of positions at moderate search depth.
 The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward.
 It can be evaluated efficiently on CPUs, and exploits the fact that only parts
 of the neural network need to be updated after a typical chess move.
-[The nodchip repository](https://github.com/nodchip/Stockfish) provides additional
-tools to train and develop the NNUE networks. On CPUs supporting modern vector instructions
-(avx2 and similar), the NNUE evaluation results in much stronger playing strength, even
-if the nodes per second computed by the engine is somewhat lower (roughly 80% of nps
-is typical).
+[The nodchip repository](https://github.com/nodchip/Stockfish) provided the first 
+version of the needed tools to train and develop the NNUE networks. Today, more 
+advanced training tools are available in 
+[the nnue-pytorch repository](https://github.com/glinscott/nnue-pytorch/), 
+while data generation tools are available in 
+[a dedicated branch](https://github.com/official-stockfish/Stockfish/tree/tools).
+
+On CPUs supporting modern vector instructions (avx2 and similar), the NNUE evaluation
+results in much stronger playing strength, even if the nodes per second computed by
+the engine is somewhat lower (roughly 80% of nps is typical).

 Notes:

-1) the NNUE evaluation depends on the Stockfish binary and the network parameter
-file (see the EvalFile UCI option). Not every parameter file is compatible with a given
-Stockfish binary, but the default value of the EvalFile UCI option is the name of a network
-that is guaranteed to be compatible with that binary.
+1) the NNUE evaluation depends on the Stockfish binary and the network parameter file 
+(see the EvalFile UCI option). Not every parameter file is compatible with a given
+Stockfish binary, but the default value of the EvalFile UCI option is the name of a 
+network that is guaranteed to be compatible with that binary.

 2) to use the NNUE evaluation, the additional data file with neural network parameters
-needs to be available. Normally, this file is already embedded in the binary or it
-can be downloaded. The filename for the default (recommended) net can be found as the default
+needs to be available. Normally, this file is already embedded in the binary or it can
+be downloaded. The filename for the default (recommended) net can be found as the default
 value of the `EvalFile` UCI option, with the format `nn-[SHA256 first 12 digits].nnue`
 (for instance, `nn-c157e0a5755b.nnue`). This file can be downloaded from
 ```
@@ -353,10 +362,10 @@ it (either by itself or as part of some bigger software package), or
 using it as the starting point for a software project of your own.

 The only real limitation is that whenever you distribute Stockfish in
-some way, you MUST always include the full source code, or a pointer
-to where the source code can be found, to generate the exact binary
-you are distributing. If you make any changes to the source code,
-these changes must also be made available under the GPL.
+some way, you MUST always include the license and the full source code
+(or a pointer to where the source code can be found) to generate the 
+exact binary you are distributing. If you make any changes to the
+source code, these changes must also be made available under the GPL v3.

 For full details, read the copy of the GPL v3 found in the file named
 [*Copying.txt*](https://github.com/official-stockfish/Stockfish/blob/master/Copying.txt).
@@ -1,205 +1,235 @@
-Contributors to Fishtest with >10,000 CPU hours, as of Jun 29, 2021.
+Contributors to Fishtest with >10,000 CPU hours, as of 2022-04-14.
 Thank you!

-Username                 CPU Hours       Games played
-----------------------------------------------------
-noobpwnftw                27649494         1834734733
-mlang                      1426107           89454622
-dew                        1380910           82831648
-mibere                      703840           46867607
-grandphish2                 692707           41737913
-tvijlbrief                  669642           42371594
-JojoM                       597778           35297180
-TueRens                     519226           31823562
-cw                          458421           30307421
-fastgm                      439667           25950040
-gvreuls                     436599           28177460
-crunchy                     427035           27344275
-CSU_Dynasty                 374765           25106278
-Fisherman                   326901           21822979
-ctoks                       325477           21767943
-velislav                    295343           18844324
-linrock                     292789           10624427
-bcross                      278584           19488961
-okrout                      262818           13803272
-pemo                        245982           11376085
-glinscott                   217799           13780820
-leszek                      212346           12959025
-nordlandia                  211692           13484886
-bking_US                    198894           11876016
-drabel                      196463           13450602
-robal                       195473           12375650
-mgrabiak                    187226           12016564
-Dantist                     183202           10990484
-Thanar                      179852           12365359
-vdv                         175274            9889046
-spams                       157128           10319326
-marrco                      150295            9402141
-sqrt2                       147963            9724586
-mhoram                      141278            8901241
-CoffeeOne                   137100            5024116
-vdbergh                     137041            8926915
-malala                      136182            8002293
-xoto                        133702            9156676
-davar                       122092            7960001
-dsmith                      122059            7570238
-Data                        113305            8220352
-BrunoBanani                 112960            7436849
-MaZePallas                  102823            6633619
-sterni1971                  100532            5880772
-ElbertoOne                   99028            7023771
-brabos                       92118            6186135
-oz                           92100            6486640
-psk                          89957            5984901
-amicic                       89156            5392305
-sunu                         88851            6028873
-Vizvezdenec                  83761            5344740
-0x3C33                       82614            5271253
-BRAVONE                      81239            5054681
-racerschmacer                80899            5759262
-cuistot                      80300            4606144
-nssy                         76497            5259388
-teddybaer                    75125            5407666
-Pking_cda                    73776            5293873
-jromang                      72192            5057715
-solarlight                   70517            5028306
-dv8silencer                  70287            3883992
-Bobo1239                     68515            4652287
-manap                        66273            4121774
-skiminki                     65088            4023328
-tinker                       64333            4268790
-sschnee                      60767            3500800
-qurashee                     57344            3168264
-robnjr                       57262            4053117
-Freja                        56938            3733019
-ttruscott                    56010            3680085
-rkl                          55132            4164467
-renouve                      53811            3501516
-finfish                      51360            3370515
-eva42                        51272            3599691
-rap                          49985            3219146
-pb00067                      49727            3298270
-ronaldjerum                  47654            3240695
-bigpen0r                     47653            3335327
-eastorwest                   47585            3221629
-biffhero                     46564            3111352
-VoyagerOne                   45476            3452465
-yurikvelo                    44834            3034550
-speedycpu                    43842            3003273
-jbwiebe                      43305            2805433
-Spprtr                       42279            2680153
-DesolatedDodo                42007            2447516
-Antihistamine                41788            2761312
-mhunt                        41735            2691355
-homyur                       39893            2850481
-gri                          39871            2515779
-Fifis                        38776            2529121
-oryx                         38724            2966648
-SC                           37290            2731014
-csnodgrass                   36207            2688994
-jmdana                       36157            2210661
-strelock                     34716            2074055
-rpngn                        33951            2057395
-Garf                         33922            2751802
-EthanOConnor                 33370            2090311
-slakovv                      32915            2021889
-manapbk                      30987            1810399
-Prcuvu                       30377            2170122
-anst                         30301            2190091
-jkiiski                      30136            1904470
-hyperbolic.tom               29840            2017394
-Pyafue                       29650            1902349
-Wolfgang                     29260            1658936
-zeryl                        28156            1579911
-OuaisBla                     27636            1578800
-DMBK                         27051            1999456
-chriswk                      26902            1868317
-achambord                    26582            1767323
-Patrick_G                    26276            1801617
-yorkman                      26193            1992080
-SFTUser                      25182            1675689
-nabildanial                  24942            1519409
-Sharaf_DG                    24765            1786697
-ncfish1                      24411            1520927
-rodneyc                      24227            1409514
-agg177                       23890            1395014
-JanErik                      23408            1703875
-Isidor                       23388            1680691
-Norabor                      23164            1591830
-cisco2015                    22897            1762669
-Zirie                        22542            1472937
-team-oh                      22272            1636708
-MazeOfGalious                21978            1629593
-sg4032                       21947            1643265
-ianh2105                     21725            1632562
-xor12                        21628            1680365
-dex                          21612            1467203
-nesoneg                      21494            1463031
-sphinx                       21211            1384728
-jjoshua2                     21001            1423089
-horst.prack                  20878            1465656
-Ente                         20865            1477066
-0xB00B1ES                    20590            1208666
-j3corre                      20405             941444
-Adrian.Schmidt123            20316            1281436
-wei                          19973            1745989
-MaxKlaxxMiner                19850            1009176
-rstoesser                    19569            1293588
-gopeto                       19491            1174952
-eudhan                       19274            1283717
-jundery                      18445            1115855
-megaman7de                   18377            1067540
-iisiraider                   18247            1101015
-ville                        17883            1384026
-chris                        17698            1487385
-purplefishies                17595            1092533
-dju                          17353             978595
-DragonLord                   17014            1162790
-IgorLeMasson                 16064            1147232
-ako027ako                    15671            1173203
-chuckstablers                15289             891576
-Nikolay.IT                   15154            1068349
-Andrew Grant                 15114             895539
-OssumOpossum                 14857            1007129
-Karby                        14808             867120
-enedene                      14476             905279
-bpfliegel                    14298             884523
-mpx86                        14019             759568
-jpulman                      13982             870599
-crocogoat                    13803            1117422
-joster                       13794             950160
-Nesa92                       13786            1114691
-Hjax                         13535             915487
-jsys14                       13459             785000
-Dark_wizzie                  13422            1007152
-mabichito                    12903             749391
-thijsk                       12886             722107
-AdrianSA                     12860             804972
-Flopzee                      12698             894821
-fatmurphy                    12547             853210
-Rudolphous                   12520             832340
-scuzzi                       12511             845761
-SapphireBrand                12416             969604
-modolief                     12386             896470
-Machariel                    12335             810784
-pgontarz                     12151             848794
-stocky                       11954             699440
-mschmidt                     11941             803401
-Maxim                        11543             836024
-infinity                     11470             727027
-torbjo                       11395             729145
-Thomas A. Anderson           11372             732094
-savage84                     11358             670860
-d64                          11263             789184
-MooTheCow                    11237             720174
-snicolet                     11106             869170
-ali-al-zhrani                11086             767926
-AndreasKrug                  10875             887457
-pirt                         10806             836519
-basepi                       10637             744851
-michaelrpg                   10508             739039
-dzjp                         10343             732529
-aga                          10302             622975
-ols                          10259             570669
-lbraesch                     10252             647825
-FormazChar                   10059             757283
+Username                                CPU Hours     Games played
+------------------------------------------------------------------
+noobpwnftw                               31714850       2267266129
+mlang                                     2954099        198421098
+technologov                               2324150        102449398
+dew                                       1670874         99276012
+grandphish2                               1134273         68070459
+okrout                                     901194         77738874
+TueRens                                    821388         50207666
+tvijlbrief                                 795993         51894442
+pemo                                       744463         32486677
+JojoM                                      724378         43660674
+mibere                                     703840         46867607
+linrock                                    626939         17408017
+gvreuls                                    534079         34352532
+cw                                         507221         34006775
+fastgm                                     489749         29344518
+crunchy                                    427035         27344275
+CSU_Dynasty                                424643         28525220
+ctoks                                      415771         27364603
+oz                                         369200         27017658
+bcross                                     342642         23671289
+Fisherman                                  327231         21829379
+velislav                                   325670         20911076
+leszek                                     321295         19874113
+Dantist                                    274747         16910258
+mgrabiak                                   237604         15418700
+robal                                      217959         13840386
+glinscott                                  217799         13780820
+nordlandia                                 211692         13484886
+drabel                                     201967         13798360
+bking_US                                   198894         11876016
+mhoram                                     194862         12261809
+Thanar                                     179852         12365359
+vdv                                        175544          9904472
+spams                                      157128         10319326
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+marrco                                     150300          9402229
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+malala                                     136182          8002293
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+dsmith                                     122059          7570238
+amicic                                     119659          7937885
+Data                                       113305          8220352
+BrunoBanani                                112960          7436849
+CypressChess                               108321          7759588
+DesolatedDodo                              106811          6776980
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+Fifis                                       45843          3088497
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+gri                                         39871          2515779
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+hyperbolic.tom                              29840          2017394
+chuckstablers                               29659          2093438
+Pyafue                                      29650          1902349
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+chriswk                                     26902          1868317
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+Patrick_G                                   26276          1801617
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+Ulysses                                     20217          1351500
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+Nikolay.IT                                  15154          1068349
+Andrew Grant                                15114           895539
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+Naven94                                     10069           503192
@@ -1,88 +0,0 @@
-version: 1.0.{build}
-clone_depth: 50
-
-branches:
-  only:
-    - master
-
-# Operating system (build VM template)
-os: Visual Studio 2019
-
-# Build platform, i.e. x86, x64, AnyCPU. This setting is optional.
-platform:
-  - x86
-  - x64
-
-# build Configuration, i.e. Debug, Release, etc.
-configuration:
-  - Debug
-  - Release
-
-matrix:
-  # The build fail immediately once one of the job fails
-  fast_finish: true
-
-# Scripts that are called at very beginning, before repo cloning
-init:
-  - cmake --version
-  - msbuild /version
-
-before_build:
-  - ps: |
-      # Get sources
-      $src = get-childitem -Path *.cpp -Recurse | select -ExpandProperty FullName
-      $src = $src -join ' '
-      $src = $src.Replace("\", "/")
-
-      # Build CMakeLists.txt
-      $t = 'cmake_minimum_required(VERSION 3.17)',
-           'project(Stockfish)',
-           'set(CMAKE_CXX_STANDARD 17)',
-           'set(CMAKE_CXX_STANDARD_REQUIRED ON)',
-           'set (CMAKE_CXX_EXTENSIONS OFF)',
-           'set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/src)',
-           'set(source_files', $src, ')',
-           'add_executable(stockfish ${source_files})'
-
-      # Write CMakeLists.txt withouth BOM
-      $MyPath = (Get-Item -Path "." -Verbose).FullName + '\CMakeLists.txt'
-      $Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding $False
-      [System.IO.File]::WriteAllLines($MyPath, $t, $Utf8NoBomEncoding)
-
-      # Obtain bench reference from git log
-      $b = git log HEAD | sls "\b[Bb]ench[ :]+[0-9]{7}" | select -first 1
-      $bench = $b -match '\D+(\d+)' | % { $matches[1] }
-      Write-Host "Reference bench:" $bench
-      $g = "Visual Studio 16 2019"
-      If (${env:PLATFORM} -eq 'x64') { $a = "x64" }
-      If (${env:PLATFORM} -eq 'x86') { $a = "Win32" }
-      cmake -G "${g}" -A ${a} .
-      Write-Host "Generated files for: " $g $a
-
-build_script:
-  - cmake --build . --config %CONFIGURATION% -- /verbosity:minimal
-  - ps: |
-      # Download default NNUE net from fishtest
-      $nnuenet = Get-Content -Path src\evaluate.h | Select-String -CaseSensitive -Pattern "EvalFileDefaultName" | Select-String -CaseSensitive -Pattern "nn-[a-z0-9]{12}.nnue"
-      $dummy = $nnuenet -match "(?<nnuenet>nn-[a-z0-9]{12}.nnue)"
-      $nnuenet = $Matches.nnuenet
-      Write-Host "Default net:" $nnuenet
-      $nnuedownloadurl = "https://tests.stockfishchess.org/api/nn/$nnuenet"
-      $nnuefilepath = "src\${env:CONFIGURATION}\$nnuenet"
-      if (Test-Path -Path $nnuefilepath) {
-            Write-Host "Already available."
-      } else {
-            Write-Host "Downloading $nnuedownloadurl to $nnuefilepath"
-            Invoke-WebRequest -Uri $nnuedownloadurl -OutFile $nnuefilepath
-      }
-
-before_test:
-  - cd src/%CONFIGURATION%
-  - stockfish bench 2> out.txt >NUL
-  - ps: |
-      # Verify bench number
-      $s = (gc "./out.txt" | out-string)
-      $r = ($s -match 'Nodes searched \D+(\d+)' | % { $matches[1] })
-      Write-Host "Engine bench:" $r
-      Write-Host "Reference bench:" $bench
-      If ($r -ne $bench) { exit 1 }
@@ -1,5 +1,5 @@
 # Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-# Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+# Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)
 #
 # Stockfish is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,11 +19,29 @@
 ### Section 1. General Configuration
 ### ==========================================================================

+### Establish the operating system name
+KERNEL = $(shell uname -s)
+ifeq ($(KERNEL),Linux)
+	OS = $(shell uname -o)
+endif
+
+### Target Windows OS
+ifeq ($(OS),Windows_NT)
+	ifneq ($(COMP),ndk)
+		target_windows = yes
+	endif
+else ifeq ($(COMP),mingw)
+	target_windows = yes
+	ifeq ($(WINE_PATH),)
+		WINE_PATH = $(shell which wine)
+	endif
+endif
+
 ### Executable name
-ifeq ($(COMP),mingw)
-EXE = stockfish.exe
+ifeq ($(target_windows),yes)
+	EXE = stockfish.exe
 else
-EXE = stockfish
+	EXE = stockfish
 endif

 ### Establish the operating system name
@@ -38,11 +56,11 @@ BINDIR = $(PREFIX)/bin

 ### Built-in benchmark for pgo-builds
 ifeq ($(SDE_PATH),)
-	PGOBENCH = ./$(EXE) bench
-	PGOGENSFEN = ./$(EXE) gensfen depth 3 loop 1000 sfen_format bin output_file_name $(PGO_TRAINING_DATA_FILE)
+	PGOBENCH = $(WINE_PATH) ./$(EXE) bench
+	PGOGENSFEN = $(WINE_PATH) ./$(EXE) gensfen depth 3 loop 1000 sfen_format bin output_file_name $(PGO_TRAINING_DATA_FILE)
 else
-	PGOBENCH = $(SDE_PATH) -- ./$(EXE) bench
-	PGOGENSFEN = $(SDE_PATH) -- ./$(EXE) gensfen depth 3 loop 1000 sfen_format bin output_file_name $(PGO_TRAINING_DATA_FILE)
+	PGOBENCH = $(SDE_PATH) -- $(WINE_PATH) ./$(EXE) bench
+	PGOGENSFEN = $(SDE_PATH) -- $(WINE_PATH) ./$(EXE) gensfen depth 3 loop 1000 sfen_format bin output_file_name $(PGO_TRAINING_DATA_FILE)
 endif

 ### Source and object files
@@ -89,6 +107,7 @@ VPATH = syzygy:nnue:nnue/features:eval:extra:tools
 # ssse3 = yes/no      --- -mssse3          --- Use Intel Supplemental Streaming SIMD Extensions 3
 # sse41 = yes/no      --- -msse4.1         --- Use Intel Streaming SIMD Extensions 4.1
 # avx2 = yes/no       --- -mavx2           --- Use Intel Advanced Vector Extensions 2
+# avxvnni = yes/no    --- -mavxvnni        --- Use Intel Vector Neural Network Instructions AVX
 # avx512 = yes/no     --- -mavx512bw       --- Use Intel Advanced Vector Extensions 512
 # vnni256 = yes/no    --- -mavx512vnni     --- Use Intel Vector Neural Network Instructions 256
 # vnni512 = yes/no    --- -mavx512vnni     --- Use Intel Vector Neural Network Instructions 512
@@ -99,7 +118,7 @@ VPATH = syzygy:nnue:nnue/features:eval:extra:tools
 # at the end of the line for flag values.
 #
 # Example of use for these flags:
-# make build ARCH=x86-64-avx512 debug=on sanitize="address undefined"
+# make build ARCH=x86-64-avx512 debug=yes sanitize="address undefined"


 ### 2.1. General and architecture defaults
@@ -111,8 +130,8 @@ endif
 # explicitly check for the list of supported architectures (as listed with make help),
 # the user can override with `make ARCH=x86-32-vnni256 SUPPORTED_ARCH=true`
 ifeq ($(ARCH), $(filter $(ARCH), \
-                 x86-64-vnni512 x86-64-vnni256 x86-64-avx512 x86-64-bmi2 x86-64-avx2 \
-                 x86-64-sse41-popcnt x86-64-modern x86-64-ssse3 x86-64-sse3-popcnt \
+                 x86-64-vnni512 x86-64-vnni256 x86-64-avx512 x86-64-avxvnni x86-64-bmi2 \
+                 x86-64-avx2 x86-64-sse41-popcnt x86-64-modern x86-64-ssse3 x86-64-sse3-popcnt \
                 x86-64 x86-32-sse41-popcnt x86-32-sse2 x86-32 ppc-64 ppc-32 e2k \
                 armv7 armv7-neon armv8 apple-silicon general-64 general-32))
   SUPPORTED_ARCH=true
@@ -133,10 +152,12 @@ sse2 = no
 ssse3 = no
 sse41 = no
 avx2 = no
+avxvnni = no
 avx512 = no
 vnni256 = no
 vnni512 = no
 neon = no
+arm_version = 0
 STRIP = strip

 ### 2.2 Architecture specific
@@ -148,7 +169,7 @@ ifeq ($(findstring x86,$(ARCH)),x86)
 ifeq ($(findstring x86-32,$(ARCH)),x86-32)
 	arch = i386
 	bits = 32
-	sse = yes
+	sse = no
 	mmx = yes
 else
 	arch = x86_64
@@ -203,6 +224,17 @@ ifeq ($(findstring -avx2,$(ARCH)),-avx2)
 	avx2 = yes
 endif

+ifeq ($(findstring -avxvnni,$(ARCH)),-avxvnni)
+	popcnt = yes
+	sse = yes
+	sse2 = yes
+	ssse3 = yes
+	sse41 = yes
+	avx2 = yes
+	avxvnni = yes
+	pext = yes
+endif
+
 ifeq ($(findstring -bmi2,$(ARCH)),-bmi2)
 	popcnt = yes
 	sse = yes
@@ -273,6 +305,7 @@ ifeq ($(ARCH),armv7)
 	arch = armv7
 	prefetch = yes
 	bits = 32
+	arm_version = 7
 endif

 ifeq ($(ARCH),armv7-neon)
@@ -281,6 +314,7 @@ ifeq ($(ARCH),armv7-neon)
 	popcnt = yes
 	neon = yes
 	bits = 32
+	arm_version = 7
 endif

 ifeq ($(ARCH),armv8)
@@ -288,6 +322,7 @@ ifeq ($(ARCH),armv8)
 	prefetch = yes
 	popcnt = yes
 	neon = yes
+	arm_version = 8
 endif

 ifeq ($(ARCH),apple-silicon)
@@ -295,6 +330,7 @@ ifeq ($(ARCH),apple-silicon)
 	prefetch = yes
 	popcnt = yes
 	neon = yes
+	arm_version = 8
 endif

 ifeq ($(ARCH),ppc-32)
@@ -326,10 +362,16 @@ endif
 ### ==========================================================================

 ### 3.1 Selecting compiler (default = gcc)
+ifeq ($(MAKELEVEL),0)
+       export ENV_CXXFLAGS := $(CXXFLAGS)
+       export ENV_DEPENDFLAGS := $(DEPENDFLAGS)
+       export ENV_LDFLAGS := $(LDFLAGS)
+endif
+
 ADDITIONAL_INCLUDE_DIRECTORIES = -I.
-CXXFLAGS += -Wall -Wcast-qual -fno-exceptions -std=c++17 $(ADDITIONAL_INCLUDE_DIRECTORIES) $(EXTRACXXFLAGS)
-DEPENDFLAGS += -std=c++17 $(ADDITIONAL_INCLUDE_DIRECTORIES)
-LDFLAGS += $(EXTRALDFLAGS)
+CXXFLAGS = $(ENV_CXXFLAGS) -Wall -Wcast-qual -fno-exceptions -std=c++17 $(ADDITIONAL_INCLUDE_DIRECTORIES) $(EXTRACXXFLAGS)
+DEPENDFLAGS = $(ENV_DEPENDFLAGS) -std=c++17 $(ADDITIONAL_INCLUDE_DIRECTORIES)
+LDFLAGS = $(ENV_LDFLAGS) $(EXTRALDFLAGS)

 ifeq ($(COMP),)
 	COMP=gcc
@@ -359,29 +401,27 @@ ifeq ($(COMP),gcc)
 	endif
 endif

+ifeq ($(target_windows),yes)
+	LDFLAGS += -static
+endif
+
 ifeq ($(COMP),mingw)
 	comp=mingw

-	ifeq ($(KERNEL),Linux)
-		ifeq ($(bits),64)
-			ifeq ($(shell which x86_64-w64-mingw32-c++-posix),)
-				CXX=x86_64-w64-mingw32-c++
-			else
-				CXX=x86_64-w64-mingw32-c++-posix
-			endif
+	ifeq ($(bits),64)
+		ifeq ($(shell which x86_64-w64-mingw32-c++-posix 2> /dev/null),)
+			CXX=x86_64-w64-mingw32-c++
 		else
-			ifeq ($(shell which i686-w64-mingw32-c++-posix),)
-				CXX=i686-w64-mingw32-c++
-			else
-				CXX=i686-w64-mingw32-c++-posix
-			endif
+			CXX=x86_64-w64-mingw32-c++-posix
 		endif
 	else
-		CXX=g++
+		ifeq ($(shell which i686-w64-mingw32-c++-posix 2> /dev/null),)
+			CXX=i686-w64-mingw32-c++
+		else
+			CXX=i686-w64-mingw32-c++-posix
+		endif
 	endif
-
-	CXXFLAGS += -Wextra -Wshadow
-	LDFLAGS += -static
+	CXXFLAGS += -pedantic -Wextra -Wshadow
 endif

 ifeq ($(COMP),icc)
@@ -393,17 +433,19 @@ endif
 ifeq ($(COMP),clang)
 	comp=clang
 	CXX=clang++
+	ifeq ($(target_windows),yes)
+		CXX=x86_64-w64-mingw32-clang++
+	endif
+
 	CXXFLAGS += -pedantic -Wextra -Wshadow

-	ifneq ($(KERNEL),Darwin)
-	ifneq ($(KERNEL),OpenBSD)
-	ifneq ($(KERNEL),FreeBSD)
+	ifeq ($(filter $(KERNEL),Darwin OpenBSD FreeBSD),)
+	ifeq ($(target_windows),)
 	ifneq ($(RTLIB),compiler-rt)
 		LDFLAGS += -latomic
 	endif
 	endif
 	endif
-	endif

 	ifeq ($(arch),$(filter $(arch),armv7 armv8))
 		ifeq ($(OS),Android)
@@ -435,11 +477,19 @@ ifeq ($(COMP),ndk)
 	ifeq ($(arch),armv7)
 		CXX=armv7a-linux-androideabi16-clang++
 		CXXFLAGS += -mthumb -march=armv7-a -mfloat-abi=softfp -mfpu=neon
-		STRIP=arm-linux-androideabi-strip
+		ifneq ($(shell which arm-linux-androideabi-strip 2>/dev/null),)
+			STRIP=arm-linux-androideabi-strip
+		else
+			STRIP=llvm-strip
+		endif
 	endif
 	ifeq ($(arch),armv8)
 		CXX=aarch64-linux-android21-clang++
-		STRIP=aarch64-linux-android-strip
+		ifneq ($(shell which aarch64-linux-android-strip 2>/dev/null),)
+			STRIP=aarch64-linux-android-strip
+		else
+			STRIP=llvm-strip
+		endif
 	endif
 	LDFLAGS += -static-libstdc++ -pie -lm -latomic
 endif
@@ -453,6 +503,9 @@ else ifeq ($(comp),clang)
 else
 	profile_make = gcc-profile-make
 	profile_use = gcc-profile-use
+	ifeq ($(KERNEL),Darwin)
+		EXTRAPROFILEFLAGS = -fvisibility=hidden
+	endif
 endif

 ### Travis CI script uses COMPILER to overwrite CXX
@@ -513,10 +566,16 @@ ifeq ($(optimize),yes)
 		endif
 	endif

-	ifeq ($(comp),$(filter $(comp),gcc clang icc))
-		ifeq ($(KERNEL),Darwin)
+	ifeq ($(KERNEL),Darwin)
+		ifeq ($(comp),$(filter $(comp),clang icc))
 			CXXFLAGS += -mdynamic-no-pic
 		endif
+
+		ifeq ($(comp),gcc)
+			ifneq ($(arch),arm64)
+				CXXFLAGS += -mdynamic-no-pic
+			endif
+		endif
 	endif

 	ifeq ($(comp),clang)
@@ -529,7 +588,7 @@ ifeq ($(bits),64)
 	CXXFLAGS += -DIS_64BIT
 endif

-### 3.5 prefetch
+### 3.5 prefetch and popcount
 ifeq ($(prefetch),yes)
 	ifeq ($(sse),yes)
 		CXXFLAGS += -msse
@@ -538,7 +597,6 @@ else
 	CXXFLAGS += -DNO_PREFETCH
 endif

-### 3.6 popcnt
 ifeq ($(popcnt),yes)
 	ifeq ($(arch),$(filter $(arch),ppc64 armv7 armv8 arm64))
 		CXXFLAGS += -DUSE_POPCNT
@@ -549,6 +607,7 @@ ifeq ($(popcnt),yes)
 	endif
 endif

+### 3.6 SIMD architectures
 ifeq ($(avx2),yes)
 	CXXFLAGS += -DUSE_AVX2
 	ifeq ($(comp),$(filter $(comp),gcc clang mingw))
@@ -556,6 +615,13 @@ ifeq ($(avx2),yes)
 	endif
 endif

+ifeq ($(avxvnni),yes)
+	CXXFLAGS += -DUSE_VNNI -DUSE_AVXVNNI
+	ifeq ($(comp),$(filter $(comp),gcc clang mingw))
+		CXXFLAGS += -mavxvnni
+	endif
+endif
+
 ifeq ($(avx512),yes)
 	CXXFLAGS += -DUSE_AVX512
 	ifeq ($(comp),$(filter $(comp),gcc clang mingw))
@@ -606,7 +672,7 @@ ifeq ($(mmx),yes)
 endif

 ifeq ($(neon),yes)
-	CXXFLAGS += -DUSE_NEON
+	CXXFLAGS += -DUSE_NEON=$(arm_version)
 	ifeq ($(KERNEL),Linux)
 	ifneq ($(COMP),ndk)
 	ifneq ($(arch),armv8)
@@ -631,9 +697,7 @@ ifeq ($(optimize),yes)
 ifeq ($(debug), no)
 	ifeq ($(comp),clang)
 		CXXFLAGS += -flto
-		ifneq ($(findstring MINGW,$(KERNEL)),)
-			CXXFLAGS += -fuse-ld=lld
-		else ifneq ($(findstring MSYS,$(KERNEL)),)
+		ifeq ($(target_windows),yes)
 			CXXFLAGS += -fuse-ld=lld
 		endif
 		LDFLAGS += $(CXXFLAGS)
@@ -644,25 +708,17 @@ ifeq ($(debug), no)
 	ifeq ($(gccisclang),)
 		CXXFLAGS += -flto
 		LDFLAGS += $(CXXFLAGS) -flto=jobserver
-		ifneq ($(findstring MINGW,$(KERNEL)),)
-			LDFLAGS += -save-temps
-		else ifneq ($(findstring MSYS,$(KERNEL)),)
-			LDFLAGS += -save-temps
-		endif
 	else
 		CXXFLAGS += -flto
 		LDFLAGS += $(CXXFLAGS)
 	endif

-# To use LTO and static linking on windows, the tool chain requires a recent gcc:
-# gcc version 10.1 in msys2 or TDM-GCC version 9.2 are known to work, older might not.
-# So, only enable it for a cross from Linux by default.
+# To use LTO and static linking on Windows,
+# the tool chain requires gcc version 10.1 or later.
 	else ifeq ($(comp),mingw)
-	ifeq ($(KERNEL),Linux)
 	ifneq ($(arch),i386)
 		CXXFLAGS += -flto
-		LDFLAGS += $(CXXFLAGS) -flto=jobserver
-	endif
+		LDFLAGS += $(CXXFLAGS) -save-temps
 	endif
 	endif
 endif
@@ -701,6 +757,7 @@ help:
 	@echo "x86-64-vnni512          > x86 64-bit with vnni support 512bit wide"
 	@echo "x86-64-vnni256          > x86 64-bit with vnni support 256bit wide"
 	@echo "x86-64-avx512           > x86 64-bit with avx512 support"
+	@echo "x86-64-avxvnni          > x86 64-bit with avxvnni support"
 	@echo "x86-64-bmi2             > x86 64-bit with bmi2 support"
 	@echo "x86-64-avx2             > x86 64-bit with avx2 support"
 	@echo "x86-64-sse41-popcnt     > x86 64-bit with sse41 and popcnt support"
@@ -763,8 +820,8 @@ profile-build: net config-sanity objclean profileclean
 	$(MAKE) ARCH=$(ARCH) COMP=$(COMP) $(profile_make)
 	@echo ""
 	@echo "Step 2/4. Running benchmark for pgo-build ..."
-	$(PGOBENCH) > /dev/null
-	$(PGOGENSFEN) > /dev/null
+	$(PGOBENCH) 2>&1 | tail -n 4
+	$(PGOGENSFEN) 2>&1 | tail -n 4
 	@echo ""
 	@echo "Step 3/4. Building optimized executable ..."
 	$(MAKE) ARCH=$(ARCH) COMP=$(COMP) objclean
@@ -779,7 +836,7 @@ strip:
 install:
 	-mkdir -p -m 755 $(BINDIR)
 	-cp $(EXE) $(BINDIR)
-	-strip $(BINDIR)/$(EXE)
+	$(STRIP) $(BINDIR)/$(EXE)

 # clean all
 clean: objclean profileclean
@@ -792,22 +849,22 @@ net:
 	$(eval nnuedownloadurl := https://tests.stockfishchess.org/api/nn/$(nnuenet))
 	$(eval curl_or_wget := $(shell if hash curl 2>/dev/null; then echo "curl -skL"; elif hash wget 2>/dev/null; then echo "wget -qO-"; fi))
 	@if test -f "$(nnuenet)"; then \
-            echo "Already available."; \
-         else \
-            if [ "x$(curl_or_wget)" = "x" ]; then \
-               echo "Automatic download failed: neither curl nor wget is installed. Install one of these tools or download the net manually"; exit 1; \
-            else \
-               echo "Downloading $(nnuedownloadurl)"; $(curl_or_wget) $(nnuedownloadurl) > $(nnuenet);\
-            fi; \
-        fi;
+		echo "Already available."; \
+	else \
+		if [ "x$(curl_or_wget)" = "x" ]; then \
+			echo "Automatic download failed: neither curl nor wget is installed. Install one of these tools or download the net manually"; exit 1; \
+		else \
+			echo "Downloading $(nnuedownloadurl)"; $(curl_or_wget) $(nnuedownloadurl) > $(nnuenet);\
+		fi; \
+	fi;
 	$(eval shasum_command := $(shell if hash shasum 2>/dev/null; then echo "shasum -a 256 "; elif hash sha256sum 2>/dev/null; then echo "sha256sum "; fi))
 	@if [ "x$(shasum_command)" != "x" ]; then \
-	    if [ "$(nnuenet)" != "nn-"`$(shasum_command) $(nnuenet) | cut -c1-12`".nnue" ]; then \
-                echo "Failed download or $(nnuenet) corrupted, please delete!"; exit 1; \
-            fi \
-         else \
-            echo "shasum / sha256sum not found, skipping net validation"; \
-        fi
+		if [ "$(nnuenet)" != "nn-"`$(shasum_command) $(nnuenet) | cut -c1-12`".nnue" ]; then \
+			echo "Failed download or $(nnuenet) corrupted, please delete!"; exit 1; \
+		fi \
+	else \
+		echo "shasum / sha256sum not found, skipping net validation"; \
+	fi

 # clean binaries and objects
 objclean:
@@ -818,8 +875,9 @@ profileclean:
 	@rm -rf profdir
 	@rm -f bench.txt *.gcda *.gcno ./syzygy/*.gcda ./nnue/*.gcda ./nnue/features/*.gcda *.s ./tools/*.gcda ./extra/*.gcda ./eval/*.gcda
 	@rm -f stockfish.profdata *.profraw
-	@rm -f stockfish.exe.lto_wrapper_args
-	@rm -f stockfish.exe.ltrans.out
+	@rm -f stockfish.*args*
+	@rm -f stockfish.*lt*
+	@rm -f stockfish.res
 	@rm -f ./-lstdc++.res

 default:
@@ -850,10 +908,12 @@ config-sanity: net
 	@echo "ssse3: '$(ssse3)'"
 	@echo "sse41: '$(sse41)'"
 	@echo "avx2: '$(avx2)'"
+	@echo "avxvnni: '$(avxvnni)'"
 	@echo "avx512: '$(avx512)'"
 	@echo "vnni256: '$(vnni256)'"
 	@echo "vnni512: '$(vnni512)'"
 	@echo "neon: '$(neon)'"
+	@echo "arm_version: '$(arm_version)'"
 	@echo ""
 	@echo "Flags:"
 	@echo "CXX: $(CXX)"
@@ -905,12 +965,14 @@ gcc-profile-make:
 	@mkdir -p profdir
 	$(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
 	EXTRACXXFLAGS='-fprofile-generate=profdir' \
+	EXTRACXXFLAGS+=$(EXTRAPROFILEFLAGS) \
 	EXTRALDFLAGS='-lgcov' \
 	all

 gcc-profile-use:
 	$(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
 	EXTRACXXFLAGS='-fprofile-use=profdir -fno-peel-loops -fno-tracer' \
+	EXTRACXXFLAGS+=$(EXTRAPROFILEFLAGS) \
 	EXTRALDFLAGS='-lgcov' \
 	all

@@ -925,7 +987,7 @@ icc-profile-use:
 	EXTRACXXFLAGS='-prof_use -prof_dir ./profdir' \
 	all

-.depend:
-	-@$(CXX) $(DEPENDFLAGS) -MM $(SRCS) > $@
+.depend: $(SRCS)
+	-@$(CXX) $(DEPENDFLAGS) -MM $(SRCS) > $@ 2> /dev/null

 -include .depend
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -87,6 +87,7 @@ const vector<string> Defaults = {
  // Chess 960
  "setoption name UCI_Chess960 value true",
  "bbqnnrkr/pppppppp/8/8/8/8/PPPPPPPP/BBQNNRKR w HFhf - 0 1 moves g2g3 d7d5 d2d4 c8h3 c1g5 e8d6 g5e7 f7f6",
+  "nqbnrkrb/pppppppp/8/8/8/8/PPPPPPPP/NQBNRKRB w KQkq - 0 1",
  "setoption name UCI_Chess960 value false"
 };

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -61,7 +61,7 @@ namespace Stockfish {
 namespace Eval {

  namespace NNUE {
-    string eval_file_loaded = "None";
+    string currentEvalFileName = "None";
    UseNNUEMode useNNUE;

    static UseNNUEMode nnue_mode_from_option(const UCI::Option& mode)
@@ -92,6 +92,8 @@ namespace Eval {
        return;

    string eval_file = string(Options["EvalFile"]);
+    if (eval_file.empty())
+        eval_file = EvalFileDefaultName;

    #if defined(DEFAULT_NNUE_DIRECTORY)
    #define stringify2(x) #x
@@ -102,13 +104,13 @@ namespace Eval {
    #endif

    for (string directory : dirs)
-        if (eval_file_loaded != eval_file)
+        if (currentEvalFileName != eval_file)
        {
            if (directory != "<internal>")
            {
                ifstream stream(directory + eval_file, ios::binary);
                if (load_eval(eval_file, stream))
-                    eval_file_loaded = eval_file;
+                    currentEvalFileName = eval_file;
            }

            if (directory == "<internal>" && eval_file == EvalFileDefaultName)
@@ -120,10 +122,11 @@ namespace Eval {

                MemoryBuffer buffer(const_cast<char*>(reinterpret_cast<const char*>(gEmbeddedNNUEData)),
                                    size_t(gEmbeddedNNUESize));
+                (void) gEmbeddedNNUEEnd; // Silence warning on unused variable

                istream stream(&buffer);
                if (load_eval(eval_file, stream))
-                    eval_file_loaded = eval_file;
+                    currentEvalFileName = eval_file;
            }
        }
  }
@@ -132,16 +135,16 @@ namespace Eval {
  void NNUE::verify() {

    string eval_file = string(Options["EvalFile"]);
+    if (eval_file.empty())
+        eval_file = EvalFileDefaultName;

-    if (useNNUE != UseNNUEMode::False && eval_file_loaded != eval_file)
+    if (useNNUE != UseNNUEMode::False && currentEvalFileName != eval_file)
    {
-        UCI::OptionsMap defaults;
-        UCI::init(defaults);

        string msg1 = "If the UCI option \"Use NNUE\" is set to true, network evaluation parameters compatible with the engine must be available.";
        string msg2 = "The option is set to true, but the network file " + eval_file + " was not loaded successfully.";
        string msg3 = "The UCI option EvalFile might need to specify the full path, including the directory name, to the network file.";
-        string msg4 = "The default net can be downloaded from: https://tests.stockfishchess.org/api/nn/" + string(defaults["EvalFile"]);
+        string msg4 = "The default net can be downloaded from: https://tests.stockfishchess.org/api/nn/" + std::string(EvalFileDefaultName);
        string msg5 = "The engine will be terminated now.";

        sync_cout << "info string ERROR: " << msg1 << sync_endl;
@@ -204,17 +207,17 @@ using namespace Trace;
 namespace {

  // Threshold for lazy and space evaluation
-  constexpr Value LazyThreshold1    =  Value(3130);
-  constexpr Value LazyThreshold2    =  Value(2204);
+  constexpr Value LazyThreshold1    =  Value(3631);
+  constexpr Value LazyThreshold2    =  Value(2084);
  constexpr Value SpaceThreshold    =  Value(11551);

  // KingAttackWeights[PieceType] contains king attack weights by piece type
-  constexpr int KingAttackWeights[PIECE_TYPE_NB] = { 0, 0, 81, 52, 44, 10 };
+  constexpr int KingAttackWeights[PIECE_TYPE_NB] = { 0, 0, 76, 46, 45, 14 };

  // SafeCheck[PieceType][single/multiple] contains safe check bonus by piece type,
  // higher if multiple safe checks are possible for that piece type.
  constexpr int SafeCheck[][2] = {
-      {}, {}, {803, 1292}, {639, 974}, {1087, 1878}, {759, 1132}
+      {}, {}, {805, 1292}, {650, 984}, {1071, 1886}, {730, 1128}
  };

 #define S(mg, eg) make_score(mg, eg)
@@ -240,58 +243,58 @@ namespace {
  // BishopPawns[distance from edge] contains a file-dependent penalty for pawns on
  // squares of the same color as our bishop.
  constexpr Score BishopPawns[int(FILE_NB) / 2] = {
-    S(3, 8), S(3, 9), S(2, 8), S(3, 8)
+    S(3, 8), S(3, 9), S(2, 7), S(3, 7)
  };

  // KingProtector[knight/bishop] contains penalty for each distance unit to own king
-  constexpr Score KingProtector[] = { S(8, 9), S(6, 9) };
+  constexpr Score KingProtector[] = { S(9, 9), S(7, 9) };

  // Outpost[knight/bishop] contains bonuses for each knight or bishop occupying a
  // pawn protected square on rank 4 to 6 which is also safe from a pawn attack.
-  constexpr Score Outpost[] = { S(57, 38), S(31, 24) };
+  constexpr Score Outpost[] = { S(54, 34), S(31, 25) };

  // PassedRank[Rank] contains a bonus according to the rank of a passed pawn
  constexpr Score PassedRank[RANK_NB] = {
-    S(0, 0), S(7, 27), S(16, 32), S(17, 40), S(64, 71), S(170, 174), S(278, 262)
+    S(0, 0), S(2, 38), S(15, 36), S(22, 50), S(64, 81), S(166, 184), S(284, 269)
  };

  constexpr Score RookOnClosedFile = S(10, 5);
-  constexpr Score RookOnOpenFile[] = { S(19, 6), S(47, 26) };
+  constexpr Score RookOnOpenFile[] = { S(18, 8), S(49, 26) };

  // ThreatByMinor/ByRook[attacked PieceType] contains bonuses according to
  // which piece type attacks which one. Attacks on lesser pieces which are
  // pawn-defended are not considered.
  constexpr Score ThreatByMinor[PIECE_TYPE_NB] = {
-    S(0, 0), S(5, 32), S(55, 41), S(77, 56), S(89, 119), S(79, 162)
+    S(0, 0), S(6, 37), S(64, 50), S(82, 57), S(103, 130), S(81, 163)
  };

  constexpr Score ThreatByRook[PIECE_TYPE_NB] = {
-    S(0, 0), S(3, 44), S(37, 68), S(42, 60), S(0, 39), S(58, 43)
+    S(0, 0), S(3, 44), S(36, 71), S(44, 59), S(0, 39), S(60, 39)
  };

  constexpr Value CorneredBishop = Value(50);

  // Assorted bonuses and penalties
-  constexpr Score UncontestedOutpost  = S(  1, 10);
+  constexpr Score UncontestedOutpost  = S(  0, 10);
  constexpr Score BishopOnKingRing    = S( 24,  0);
  constexpr Score BishopXRayPawns     = S(  4,  5);
  constexpr Score FlankAttacks        = S(  8,  0);
-  constexpr Score Hanging             = S( 69, 36);
+  constexpr Score Hanging             = S( 72, 40);
  constexpr Score KnightOnQueen       = S( 16, 11);
  constexpr Score LongDiagonalBishop  = S( 45,  0);
  constexpr Score MinorBehindPawn     = S( 18,  3);
-  constexpr Score PassedFile          = S( 11,  8);
-  constexpr Score PawnlessFlank       = S( 17, 95);
-  constexpr Score ReachableOutpost    = S( 31, 22);
-  constexpr Score RestrictedPiece     = S(  7,  7);
+  constexpr Score PassedFile          = S( 13,  8);
+  constexpr Score PawnlessFlank       = S( 19, 97);
+  constexpr Score ReachableOutpost    = S( 33, 19);
+  constexpr Score RestrictedPiece     = S(  6,  7);
  constexpr Score RookOnKingRing      = S( 16,  0);
-  constexpr Score SliderOnQueen       = S( 60, 18);
-  constexpr Score ThreatByKing        = S( 24, 89);
+  constexpr Score SliderOnQueen       = S( 62, 21);
+  constexpr Score ThreatByKing        = S( 24, 87);
  constexpr Score ThreatByPawnPush    = S( 48, 39);
-  constexpr Score ThreatBySafePawn    = S(173, 94);
+  constexpr Score ThreatBySafePawn    = S(167, 99);
  constexpr Score TrappedRook         = S( 55, 13);
  constexpr Score WeakQueenProtection = S( 14,  0);
-  constexpr Score WeakQueen           = S( 56, 15);
+  constexpr Score WeakQueen           = S( 57, 19);


 #undef S
@@ -1000,7 +1003,9 @@ namespace {

    // Early exit if score is high
    auto lazy_skip = [&](Value lazyThreshold) {
-        return abs(mg_value(score) + eg_value(score)) > lazyThreshold + pos.non_pawn_material() / 32;
+        return abs(mg_value(score) + eg_value(score)) >   lazyThreshold
+                                                        + std::abs(pos.this_thread()->bestValue) * 5 / 4
+                                                        + pos.non_pawn_material() / 32;
    };

    if (lazy_skip(LazyThreshold1))
@@ -1065,26 +1070,22 @@ make_v:

    if (   pos.piece_on(SQ_A1) == W_BISHOP
        && pos.piece_on(SQ_B2) == W_PAWN)
-        correction += !pos.empty(SQ_B3) ? -CorneredBishop * 4
-                                        : -CorneredBishop * 3;
+        correction -= CorneredBishop;

    if (   pos.piece_on(SQ_H1) == W_BISHOP
        && pos.piece_on(SQ_G2) == W_PAWN)
-        correction += !pos.empty(SQ_G3) ? -CorneredBishop * 4
-                                        : -CorneredBishop * 3;
+        correction -= CorneredBishop;

    if (   pos.piece_on(SQ_A8) == B_BISHOP
        && pos.piece_on(SQ_B7) == B_PAWN)
-        correction += !pos.empty(SQ_B6) ? CorneredBishop * 4
-                                        : CorneredBishop * 3;
+        correction += CorneredBishop;

    if (   pos.piece_on(SQ_H8) == B_BISHOP
        && pos.piece_on(SQ_G7) == B_PAWN)
-        correction += !pos.empty(SQ_G6) ? CorneredBishop * 4
-                                        : CorneredBishop * 3;
+        correction += CorneredBishop;

-    return pos.side_to_move() == WHITE ?  Value(correction)
-                                       : -Value(correction);
+    return pos.side_to_move() == WHITE ?  Value(3 * correction)
+                                       : -Value(3 * correction);
  }

 } // namespace Eval
@@ -1107,37 +1108,39 @@ Value Eval::evaluate(const Position& pos) {

      return v;
  }
-  else if (NNUE::useNNUE == NNUE::UseNNUEMode::False)
-      v = Evaluation<NO_TRACE>(pos).value();
-  else
+
+  // Deciding between classical and NNUE eval (~10 Elo): for high PSQ imbalance we use classical,
+  // but we switch to NNUE during long shuffling or with high material on the board.
+  bool useClassical = (pos.this_thread()->depth > 9 || pos.count<ALL_PIECES>() > 7) &&
+          abs(eg_value(pos.psq_score())) * 5 > (856 + pos.non_pawn_material() / 64) * (10 + pos.rule50_count());
+
+  // Deciding between classical and NNUE eval (~10 Elo): for high PSQ imbalance we use classical,
+  // but we switch to NNUE during long shuffling or with high material on the board.
+  if (NNUE::useNNUE == NNUE::UseNNUEMode::False || useClassical)
  {
-      // Scale and shift NNUE for compatibility with search and classical evaluation
-      auto  adjusted_NNUE = [&]()
-      {
-         int scale =   883
-                     + 32 * pos.count<PAWN>()
-                     + 32 * pos.non_pawn_material() / 1024;
+      v = Evaluation<NO_TRACE>(pos).value();          // classical
+      useClassical = abs(v) >= 297;
+  }

-         Value nnue = NNUE::evaluate(pos, true) * scale / 1024;
+  // If result of a classical evaluation is much lower than threshold fall back to NNUE
+  if (NNUE::useNNUE != NNUE::UseNNUEMode::False && !useClassical)
+  {
+       Value nnue     = NNUE::evaluate(pos, true);     // NNUE
+       int scale      = 1080 + 110 * pos.non_pawn_material() / 5120;
+       Color stm      = pos.side_to_move();
+       Value optimism = pos.this_thread()->optimism[stm];
+       Value psq      = (stm == WHITE ? 1 : -1) * eg_value(pos.psq_score());
+       int complexity = (278 * abs(nnue - psq)) / 256;

-         if (pos.is_chess960())
-             nnue += fix_FRC(pos);
+       optimism = optimism * (251 + complexity) / 256;
+       v = (nnue * scale + optimism * (scale - 852)) / 1024;

-         return nnue;
-      };
-
-      // If there is PSQ imbalance we use the classical eval, but we switch to
-      // NNUE eval faster when shuffling or if the material on the board is high.
-      int r50 = pos.rule50_count();
-      Value psq = Value(abs(eg_value(pos.psq_score())));
-      bool classical = psq * 5 > (850 + pos.non_pawn_material() / 64) * (5 + r50);
-
-      v = classical ? Evaluation<NO_TRACE>(pos).value()  // classical
-                    : adjusted_NNUE();                   // NNUE
+       if (pos.is_chess960())
+           v += fix_FRC(pos);
  }

  // Damp down the evaluation linearly when shuffling
-  v = v * (100 - pos.rule50_count()) / 100;
+  v = v * (195 - pos.rule50_count()) / 211;

  // Guarantee evaluation does not hit the tablebase range
  v = std::clamp(v, VALUE_TB_LOSS_IN_MAX_PLY + 1, VALUE_TB_WIN_IN_MAX_PLY - 1);
@@ -1162,7 +1165,12 @@ std::string Eval::trace(Position& pos) {

  std::memset(scores, 0, sizeof(scores));

-  pos.this_thread()->trend = SCORE_ZERO; // Reset any dynamic contempt
+  // Reset any global variable used in eval
+  pos.this_thread()->depth           = 0;
+  pos.this_thread()->trend           = SCORE_ZERO;
+  pos.this_thread()->bestValue       = VALUE_ZERO;
+  pos.this_thread()->optimism[WHITE] = VALUE_ZERO;
+  pos.this_thread()->optimism[BLACK] = VALUE_ZERO;

  v = Evaluation<TRACE>(pos).value();

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -36,7 +36,7 @@ namespace Eval {
  // The default net name MUST follow the format nn-[SHA256 first 12 digits].nnue
  // for the build process (profile-build and fishtest) to work. Do not change the
  // name of the macro, as it is used in the Makefile.
-  #define EvalFileDefaultName   "nn-e8321e467bf6.nnue"
+  #define EvalFileDefaultName   "nn-3c0aa92af1da.nnue"

  namespace NNUE {
    enum struct UseNNUEMode
@@ -47,7 +47,7 @@ namespace Eval {
    };

    extern UseNNUEMode useNNUE;
-    extern std::string eval_file_loaded;
+    extern std::string currentEvalFileName;

    std::string trace(Position& pos);
    Value evaluate(const Position& pos, bool adjusted = false);
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -36,6 +36,8 @@ typedef bool(*fun1_t)(LOGICAL_PROCESSOR_RELATIONSHIP,
                      PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX, PDWORD);
 typedef bool(*fun2_t)(USHORT, PGROUP_AFFINITY);
 typedef bool(*fun3_t)(HANDLE, CONST GROUP_AFFINITY*, PGROUP_AFFINITY);
+typedef bool(*fun4_t)(USHORT, PGROUP_AFFINITY, USHORT, PUSHORT);
+typedef WORD(*fun5_t)();
 }
 #endif

@@ -112,7 +114,14 @@ public:

    static Logger l;

-    if (!fname.empty() && !l.file.is_open())
+    if (l.file.is_open())
+    {
+        cout.rdbuf(l.out.buf);
+        cin.rdbuf(l.in.buf);
+        l.file.close();
+    }
+
+    if (!fname.empty())
    {
        l.file.open(fname, ifstream::out);

@@ -125,12 +134,6 @@ public:
        cin.rdbuf(&l.in);
        cout.rdbuf(&l.out);
    }
-    else if (fname.empty() && l.file.is_open())
-    {
-        cout.rdbuf(l.out.buf);
-        cin.rdbuf(l.in.buf);
-        l.file.close();
-    }
  }
 };

@@ -496,11 +499,11 @@ void bindThisThread(size_t) {}

 #else

-/// best_group() retrieves logical processor information using Windows specific
-/// API and returns the best group id for the thread with index idx. Original
+/// best_node() retrieves logical processor information using Windows specific
+/// API and returns the best node id for the thread with index idx. Original
 /// code from Texel by Peter Österlund.

-int best_group(size_t idx) {
+int best_node(size_t idx) {

  int threads = 0;
  int nodes = 0;
@@ -514,7 +517,8 @@ int best_group(size_t idx) {
  if (!fun1)
      return -1;

-  // First call to get returnLength. We expect it to fail due to null buffer
+  // First call to GetLogicalProcessorInformationEx() to get returnLength.
+  // We expect the call to fail due to null buffer.
  if (fun1(RelationAll, nullptr, &returnLength))
      return -1;

@@ -522,7 +526,7 @@ int best_group(size_t idx) {
  SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX *buffer, *ptr;
  ptr = buffer = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX*)malloc(returnLength);

-  // Second call, now we expect to succeed
+  // Second call to GetLogicalProcessorInformationEx(), now we expect to succeed
  if (!fun1(RelationAll, buffer, &returnLength))
  {
      free(buffer);
@@ -572,22 +576,38 @@ int best_group(size_t idx) {
 void bindThisThread(size_t idx) {

  // Use only local variables to be thread-safe
-  int group = best_group(idx);
+  int node = best_node(idx);

-  if (group == -1)
+  if (node == -1)
      return;

  // Early exit if the needed API are not available at runtime
  HMODULE k32 = GetModuleHandle("Kernel32.dll");
  auto fun2 = (fun2_t)(void(*)())GetProcAddress(k32, "GetNumaNodeProcessorMaskEx");
  auto fun3 = (fun3_t)(void(*)())GetProcAddress(k32, "SetThreadGroupAffinity");
+  auto fun4 = (fun4_t)(void(*)())GetProcAddress(k32, "GetNumaNodeProcessorMask2");
+  auto fun5 = (fun5_t)(void(*)())GetProcAddress(k32, "GetMaximumProcessorGroupCount");

  if (!fun2 || !fun3)
      return;

-  GROUP_AFFINITY affinity;
-  if (fun2(group, &affinity))
-      fun3(GetCurrentThread(), &affinity, nullptr);
+  if (!fun4 || !fun5)
+  {
+      GROUP_AFFINITY affinity;
+      if (fun2(node, &affinity))                                                 // GetNumaNodeProcessorMaskEx
+          fun3(GetCurrentThread(), &affinity, nullptr);                          // SetThreadGroupAffinity
+  }
+  else
+  {
+      // If a numa node has more than one processor group, we assume they are
+      // sized equal and we spread threads evenly across the groups.
+      USHORT elements, returnedElements;
+      elements = fun5();                                                         // GetMaximumProcessorGroupCount
+      GROUP_AFFINITY *affinity = (GROUP_AFFINITY*)malloc(elements * sizeof(GROUP_AFFINITY));
+      if (fun4(node, affinity, elements, &returnedElements))                     // GetNumaNodeProcessorMask2
+          fun3(GetCurrentThread(), &affinity[idx % returnedElements], nullptr);  // SetThreadGroupAffinity
+      free(affinity);
+  }
 }

 #endif
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -108,19 +108,30 @@ static inline const union { uint32_t i; char c[4]; } Le = { 0x01020304 };
 static inline const bool IsLittleEndian = (Le.c[0] == 4);


-template <typename T>
-class ValueListInserter {
-public:
-  ValueListInserter(T* v, std::size_t& s) :
-    values(v),
-    size(&s)
-  {
-  }
+// RunningAverage : a class to calculate a running average of a series of values.
+// For efficiency, all computations are done with integers.
+class RunningAverage {
+  public:

-  void push_back(const T& value) { values[(*size)++] = value; }
-private:
-  T* values;
-  std::size_t* size;
+      // Reset the running average to rational value p / q
+      void set(int64_t p, int64_t q)
+        { average = p * PERIOD * RESOLUTION / q; }
+
+      // Update average with value v
+      void update(int64_t v)
+        { average = RESOLUTION * v + (PERIOD - 1) * average / PERIOD; }
+
+      // Test if average is strictly greater than rational a / b
+      bool is_greater(int64_t a, int64_t b) const
+        { return b * average > a * (PERIOD * RESOLUTION); }
+
+      int64_t value() const
+        { return average / (PERIOD * RESOLUTION); }
+
+  private :
+      static constexpr int64_t PERIOD     = 4096;
+      static constexpr int64_t RESOLUTION = 1024;
+      int64_t average;
 };

 template <typename T, std::size_t MaxSize>
@@ -136,7 +147,6 @@ public:
  const T& operator[](std::size_t index) const { return values_[index]; }
  const T* begin() const { return values_; }
  const T* end() const { return values_ + size_; }
-  operator ValueListInserter<T>() { return ValueListInserter(values_, size_); }

  void swap(ValueList& other) {
    const std::size_t maxSize = std::max(size_, other.size_);
@@ -365,6 +375,32 @@ public:

 extern SynchronizedRegionLogger sync_region_cout;

+/// sigmoid(t, x0, y0, C, P, Q) implements a sigmoid-like function using only integers,
+/// with the following properties:
+///
+///  -  sigmoid is centered in (x0, y0)
+///  -  sigmoid has amplitude [-P/Q , P/Q] instead of [-1 , +1]
+///  -  limit is (y0 - P/Q) when t tends to -infinity
+///  -  limit is (y0 + P/Q) when t tends to +infinity
+///  -  the slope can be adjusted using C > 0, smaller C giving a steeper sigmoid
+///  -  the slope of the sigmoid when t = x0 is P/(Q*C)
+///  -  sigmoid is increasing with t when P > 0 and Q > 0
+///  -  to get a decreasing sigmoid, change sign of P
+///  -  mean value of the sigmoid is y0
+///
+/// Use <https://www.desmos.com/calculator/jhh83sqq92> to draw the sigmoid
+
+inline int64_t sigmoid(int64_t t, int64_t x0,
+                                  int64_t y0,
+                                  int64_t  C,
+                                  int64_t  P,
+                                  int64_t  Q)
+{
+   assert(C > 0);
+   assert(Q != 0);
+   return y0 + P * (t-x0) / (Q * (std::abs(t-x0) + C)) ;
+}
+

 /// xorshift64star Pseudo-Random Number Generator
 /// This class is based on original code written and dedicated
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -52,9 +52,9 @@ namespace {
    constexpr Direction UpRight  = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
    constexpr Direction UpLeft   = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);

-    const Bitboard emptySquares = Type == QUIETS || Type == QUIET_CHECKS ? target : ~pos.pieces();
-    const Bitboard enemies      = Type == EVASIONS ? pos.checkers()
-                                : Type == CAPTURES ? target : pos.pieces(Them);
+    const Bitboard emptySquares = ~pos.pieces();
+    const Bitboard enemies      =  Type == EVASIONS ? pos.checkers()
+                                                    : pos.pieces(Them);

    Bitboard pawnsOn7    = pos.pieces(Us, PAWN) &  TRank7BB;
    Bitboard pawnsNotOn7 = pos.pieces(Us, PAWN) & ~TRank7BB;
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -18,6 +18,7 @@

 #include <cassert>

+#include "bitboard.h"
 #include "movepick.h"

 namespace Stockfish {
@@ -56,11 +57,14 @@ namespace {
 /// ordering is at the current node.

 /// MovePicker constructor for the main search
-MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const ButterflyHistory* mh, const LowPlyHistory* lp,
-                       const CapturePieceToHistory* cph, const PieceToHistory** ch, Move cm, const Move* killers, int pl)
-           : pos(p), mainHistory(mh), lowPlyHistory(lp), captureHistory(cph), continuationHistory(ch),
-             ttMove(ttm), refutations{{killers[0], 0}, {killers[1], 0}, {cm, 0}}, depth(d), ply(pl) {
-
+MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const ButterflyHistory* mh,
+                                                             const CapturePieceToHistory* cph,
+                                                             const PieceToHistory** ch,
+                                                             Move cm,
+                                                             const Move* killers)
+           : pos(p), mainHistory(mh), captureHistory(cph), continuationHistory(ch),
+             ttMove(ttm), refutations{{killers[0], 0}, {killers[1], 0}, {cm, 0}}, depth(d)
+{
  assert(d > 0);

  stage = (pos.checkers() ? EVASION_TT : MAIN_TT) +
@@ -69,9 +73,11 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const ButterflyHist

 /// MovePicker constructor for quiescence search
 MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const ButterflyHistory* mh,
-                       const CapturePieceToHistory* cph, const PieceToHistory** ch, Square rs)
-           : pos(p), mainHistory(mh), captureHistory(cph), continuationHistory(ch), ttMove(ttm), recaptureSquare(rs), depth(d) {
-
+                                                             const CapturePieceToHistory* cph,
+                                                             const PieceToHistory** ch,
+                                                             Square rs)
+           : pos(p), mainHistory(mh), captureHistory(cph), continuationHistory(ch), ttMove(ttm), recaptureSquare(rs), depth(d)
+{
  assert(d <= 0);

  stage = (pos.checkers() ? EVASION_TT : QSEARCH_TT) +
@@ -82,9 +88,9 @@ MovePicker::MovePicker(const Position& p, Move ttm, Depth d, const ButterflyHist

 /// MovePicker constructor for ProbCut: we generate captures with SEE greater
 /// than or equal to the given threshold.
-MovePicker::MovePicker(const Position& p, Move ttm, Value th, const CapturePieceToHistory* cph)
-           : pos(p), captureHistory(cph), ttMove(ttm), threshold(th) {
-
+MovePicker::MovePicker(const Position& p, Move ttm, Value th, Depth d, const CapturePieceToHistory* cph)
+           : pos(p), captureHistory(cph), ttMove(ttm), threshold(th), depth(d)
+{
  assert(!pos.checkers());

  stage = PROBCUT_TT + !(ttm && pos.capture(ttm)
@@ -100,10 +106,35 @@ void MovePicker::score() {

  static_assert(Type == CAPTURES || Type == QUIETS || Type == EVASIONS, "Wrong type");

+  Bitboard threatened, threatenedByPawn, threatenedByMinor, threatenedByRook;
+  if constexpr (Type == QUIETS)
+  {
+      Color us = pos.side_to_move();
+      // squares threatened by pawns
+      threatenedByPawn  = pos.attacks_by<PAWN>(~us);
+      // squares threatened by minors or pawns
+      threatenedByMinor = pos.attacks_by<KNIGHT>(~us) | pos.attacks_by<BISHOP>(~us) | threatenedByPawn;
+      // squares threatened by rooks, minors or pawns
+      threatenedByRook  = pos.attacks_by<ROOK>(~us) | threatenedByMinor;
+
+      // pieces threatened by pieces of lesser material value
+      threatened =  (pos.pieces(us, QUEEN) & threatenedByRook)
+                  | (pos.pieces(us, ROOK)  & threatenedByMinor)
+                  | (pos.pieces(us, KNIGHT, BISHOP) & threatenedByPawn);
+  }
+  else
+  {
+      // Silence unused variable warnings
+      (void) threatened;
+      (void) threatenedByPawn;
+      (void) threatenedByMinor;
+      (void) threatenedByRook;
+  }
+
  for (auto& m : *this)
      if constexpr (Type == CAPTURES)
-          m.value =  int(PieceValue[MG][pos.piece_on(to_sq(m))]) * 6
-                   + (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))];
+          m.value =  6 * int(PieceValue[MG][pos.piece_on(to_sq(m))])
+                   +     (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))];

      else if constexpr (Type == QUIETS)
          m.value =      (*mainHistory)[pos.side_to_move()][from_to(m)]
@@ -111,7 +142,12 @@ void MovePicker::score() {
                   +     (*continuationHistory[1])[pos.moved_piece(m)][to_sq(m)]
                   +     (*continuationHistory[3])[pos.moved_piece(m)][to_sq(m)]
                   +     (*continuationHistory[5])[pos.moved_piece(m)][to_sq(m)]
-                   + (ply < MAX_LPH ? 6 * (*lowPlyHistory)[ply][from_to(m)] : 0);
+                   +     (threatened & from_sq(m) ?
+                           (type_of(pos.moved_piece(m)) == QUEEN && !(to_sq(m) & threatenedByRook)  ? 50000
+                          : type_of(pos.moved_piece(m)) == ROOK  && !(to_sq(m) & threatenedByMinor) ? 25000
+                          :                                         !(to_sq(m) & threatenedByPawn)  ? 15000
+                          :                                                                           0)
+                          :                                                                           0);

      else // Type == EVASIONS
      {
@@ -165,11 +201,12 @@ top:
      endMoves = generate<CAPTURES>(pos, cur);

      score<CAPTURES>();
+      partial_insertion_sort(cur, endMoves, -3000 * depth);
      ++stage;
      goto top;

  case GOOD_CAPTURE:
-      if (select<Best>([&](){
+      if (select<Next>([&](){
                       return pos.see_ge(*cur, Value(-69 * cur->value / 1024)) ?
                              // Move losing capture to endBadCaptures to be tried later
                              true : (*endBadCaptures++ = *cur, false); }))
@@ -237,10 +274,10 @@ top:
      return select<Best>([](){ return true; });

  case PROBCUT:
-      return select<Best>([&](){ return pos.see_ge(*cur, threshold); });
+      return select<Next>([&](){ return pos.see_ge(*cur, threshold); });

  case QCAPTURE:
-      if (select<Best>([&](){ return   depth > DEPTH_QS_RECAPTURES
+      if (select<Next>([&](){ return   depth > DEPTH_QS_RECAPTURES
                                    || to_sq(*cur) == recaptureSquare; }))
          return *(cur - 1);

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -86,13 +86,7 @@ enum StatsType { NoCaptures, Captures };
 /// unsuccessful during the current search, and is used for reduction and move
 /// ordering decisions. It uses 2 tables (one for each color) indexed by
 /// the move's from and to squares, see www.chessprogramming.org/Butterfly_Boards
-typedef Stats<int16_t, 13365, COLOR_NB, int(SQUARE_NB) * int(SQUARE_NB)> ButterflyHistory;
-
-/// At higher depths LowPlyHistory records successful quiet moves near the root
-/// and quiet moves which are/were in the PV (ttPv). It is cleared with each new
-/// search and filled during iterative deepening.
-constexpr int MAX_LPH = 4;
-typedef Stats<int16_t, 10692, MAX_LPH, int(SQUARE_NB) * int(SQUARE_NB)> LowPlyHistory;
+typedef Stats<int16_t, 14365, COLOR_NB, int(SQUARE_NB) * int(SQUARE_NB)> ButterflyHistory;

 /// CounterMoveHistory stores counter moves indexed by [piece][to] of the previous
 /// move, see www.chessprogramming.org/Countermove_Heuristic
@@ -123,18 +117,16 @@ class MovePicker {
 public:
  MovePicker(const MovePicker&) = delete;
  MovePicker& operator=(const MovePicker&) = delete;
-  MovePicker(const Position&, Move, Value, const CapturePieceToHistory*);
+  MovePicker(const Position&, Move, Depth, const ButterflyHistory*,
+                                           const CapturePieceToHistory*,
+                                           const PieceToHistory**,
+                                           Move,
+                                           const Move*);
  MovePicker(const Position&, Move, Depth, const ButterflyHistory*,
                                           const CapturePieceToHistory*,
                                           const PieceToHistory**,
                                           Square);
-  MovePicker(const Position&, Move, Depth, const ButterflyHistory*,
-                                           const LowPlyHistory*,
-                                           const CapturePieceToHistory*,
-                                           const PieceToHistory**,
-                                           Move,
-                                           const Move*,
-                                           int);
+  MovePicker(const Position&, Move, Value, Depth, const CapturePieceToHistory*);
  Move next_move(bool skipQuiets = false);

 private:
@@ -145,7 +137,6 @@ private:

  const Position& pos;
  const ButterflyHistory* mainHistory;
-  const LowPlyHistory* lowPlyHistory;
  const CapturePieceToHistory* captureHistory;
  const PieceToHistory** continuationHistory;
  Move ttMove;
@@ -154,7 +145,6 @@ private:
  Square recaptureSquare;
  Value threshold;
  Depth depth;
-  int ply;
  ExtMove moves[MAX_MOVES];
 };

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -109,7 +109,7 @@ namespace Stockfish::Eval::NNUE {
  {
    write_little_endian<std::uint32_t>(stream, Version);
    write_little_endian<std::uint32_t>(stream, hashValue);
-    write_little_endian<std::uint32_t>(stream, desc.size());
+    write_little_endian<std::uint32_t>(stream, (std::uint32_t)desc.size());
    stream.write(&desc[0], desc.size());
    return !stream.fail();
  }
@@ -143,39 +143,29 @@ namespace Stockfish::Eval::NNUE {
    // overaligning stack variables with alignas() doesn't work correctly.

    constexpr uint64_t alignment = CacheLineSize;
+    int delta = 10 - pos.non_pawn_material() / 1515;

 #if defined(ALIGNAS_ON_STACK_VARIABLES_BROKEN)
    TransformedFeatureType transformedFeaturesUnaligned[
      FeatureTransformer::BufferSize + alignment / sizeof(TransformedFeatureType)];
-    char bufferUnaligned[Network::BufferSize + alignment];

    auto* transformedFeatures = align_ptr_up<alignment>(&transformedFeaturesUnaligned[0]);
-    auto* buffer = align_ptr_up<alignment>(&bufferUnaligned[0]);
 #else
    alignas(alignment)
      TransformedFeatureType transformedFeatures[FeatureTransformer::BufferSize];
-    alignas(alignment) char buffer[Network::BufferSize];
 #endif

    ASSERT_ALIGNED(transformedFeatures, alignment);
-    ASSERT_ALIGNED(buffer, alignment);

-    const std::size_t bucket = (pos.count<ALL_PIECES>() - 1) / 4;
+    const int bucket = (pos.count<ALL_PIECES>() - 1) / 4;
    const auto psqt = featureTransformer->transform(pos, transformedFeatures, bucket);
-    const auto output = network[bucket]->propagate(transformedFeatures, buffer);
+    const auto positional = network[bucket]->propagate(transformedFeatures);

-    int materialist = psqt;
-    int positional  = output[0];
-
-    int delta_npm = abs(pos.non_pawn_material(WHITE) - pos.non_pawn_material(BLACK));
-    int entertainment = (adjusted && delta_npm <= BishopValueMg - KnightValueMg ? 7 : 0);
-
-    int A = 128 - entertainment;
-    int B = 128 + entertainment;
-
-    int sum = (A * materialist + B * positional) / 128;
-
-    return static_cast<Value>( sum / OutputScale );
+    // Give more value to positional evaluation when adjusted flag is set
+    if (adjusted)
+        return static_cast<Value>(((128 - delta) * psqt + (128 + delta) * positional) / 128 / OutputScale);
+    else
+        return static_cast<Value>((psqt + positional) / OutputScale);
  }

  struct NnueEvalTrace {
@@ -196,27 +186,20 @@ namespace Stockfish::Eval::NNUE {
 #if defined(ALIGNAS_ON_STACK_VARIABLES_BROKEN)
    TransformedFeatureType transformedFeaturesUnaligned[
      FeatureTransformer::BufferSize + alignment / sizeof(TransformedFeatureType)];
-    char bufferUnaligned[Network::BufferSize + alignment];

    auto* transformedFeatures = align_ptr_up<alignment>(&transformedFeaturesUnaligned[0]);
-    auto* buffer = align_ptr_up<alignment>(&bufferUnaligned[0]);
 #else
    alignas(alignment)
      TransformedFeatureType transformedFeatures[FeatureTransformer::BufferSize];
-    alignas(alignment) char buffer[Network::BufferSize];
 #endif

    ASSERT_ALIGNED(transformedFeatures, alignment);
-    ASSERT_ALIGNED(buffer, alignment);

    NnueEvalTrace t{};
    t.correctBucket = (pos.count<ALL_PIECES>() - 1) / 4;
-    for (std::size_t bucket = 0; bucket < LayerStacks; ++bucket) {
-      const auto psqt = featureTransformer->transform(pos, transformedFeatures, bucket);
-      const auto output = network[bucket]->propagate(transformedFeatures, buffer);
-
-      int materialist = psqt;
-      int positional  = output[0];
+    for (IndexType bucket = 0; bucket < LayerStacks; ++bucket) {
+      const auto materialist = featureTransformer->transform(pos, transformedFeatures, bucket);
+      const auto positional = network[bucket]->propagate(transformedFeatures);

      t.psqt[bucket] = static_cast<Value>( materialist / OutputScale );
      t.positional[bucket] = static_cast<Value>( positional / OutputScale );
@@ -239,7 +222,7 @@ namespace Stockfish::Eval::NNUE {
    {
        buffer[1] = '0' + cp / 10000; cp %= 10000;
        buffer[2] = '0' + cp / 1000; cp %= 1000;
-        buffer[3] = '0' + cp / 100; cp %= 100;
+        buffer[3] = '0' + cp / 100;
        buffer[4] = ' ';
    }
    else if (cp >= 1000)
@@ -396,7 +379,7 @@ namespace Stockfish::Eval::NNUE {
        actualFilename = filename.value();
    else
    {
-        if (eval_file_loaded != EvalFileDefaultName)
+        if (currentEvalFileName != EvalFileDefaultName)
        {
             msg = "Failed to export a net. A non-embedded net can only be saved if the filename is specified";

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -39,7 +39,7 @@ namespace Stockfish::Eval::NNUE::Features {
  void HalfKAv2_hm::append_active_indices(
    const Position& pos,
    Color perspective,
-    ValueListInserter<IndexType> active
+    IndexList& active
  ) {
    Square ksq = pos.square<KING>(perspective);
    Bitboard bb = pos.pieces();
@@ -55,22 +55,20 @@ namespace Stockfish::Eval::NNUE::Features {

  void HalfKAv2_hm::append_changed_indices(
    Square ksq,
-    StateInfo* st,
+    const DirtyPiece& dp,
    Color perspective,
-    ValueListInserter<IndexType> removed,
-    ValueListInserter<IndexType> added
+    IndexList& removed,
+    IndexList& added
  ) {
-    const auto& dp = st->dirtyPiece;
    for (int i = 0; i < dp.dirty_num; ++i) {
-      Piece pc = dp.piece[i];
      if (dp.from[i] != SQ_NONE)
-        removed.push_back(make_index(perspective, dp.from[i], pc, ksq));
+        removed.push_back(make_index(perspective, dp.from[i], dp.piece[i], ksq));
      if (dp.to[i] != SQ_NONE)
-        added.push_back(make_index(perspective, dp.to[i], pc, ksq));
+        added.push_back(make_index(perspective, dp.to[i], dp.piece[i], ksq));
    }
  }

-  int HalfKAv2_hm::update_cost(StateInfo* st) {
+  int HalfKAv2_hm::update_cost(const StateInfo* st) {
    return st->dirtyPiece.dirty_num;
  }

@@ -78,7 +76,7 @@ namespace Stockfish::Eval::NNUE::Features {
    return pos.count<ALL_PIECES>();
  }

-  bool HalfKAv2_hm::requires_refresh(StateInfo* st, Color perspective) {
+  bool HalfKAv2_hm::requires_refresh(const StateInfo* st, Color perspective) {
    return st->dirtyPiece.piece[0] == make_piece(perspective, KING);
  }

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -50,7 +50,7 @@ namespace Stockfish::Eval::NNUE::Features {
      PS_W_QUEEN  =  8 * SQUARE_NB,
      PS_B_QUEEN  =  9 * SQUARE_NB,
      PS_KING     =  10 * SQUARE_NB,
-      PS_NB = 11 * SQUARE_NB
+      PS_NB       =  11 * SQUARE_NB
    };

    static constexpr IndexType PieceSquareIndex[COLOR_NB][PIECE_NB] = {
@@ -85,36 +85,38 @@ namespace Stockfish::Eval::NNUE::Features {
      -1, -1, -1, -1, 23, 22, 21, 20,
      -1, -1, -1, -1, 19, 18, 17, 16,
      -1, -1, -1, -1, 15, 14, 13, 12,
-      -1, -1, -1, -1, 11, 10, 9, 8,
-      -1, -1, -1, -1, 7, 6, 5, 4,
-      -1, -1, -1, -1, 3, 2, 1, 0
+      -1, -1, -1, -1, 11, 10,  9,  8,
+      -1, -1, -1, -1,  7,  6,  5,  4,
+      -1, -1, -1, -1,  3,  2,  1,  0
    };

    // Maximum number of simultaneously active features.
    static constexpr IndexType MaxActiveDimensions = 32;
+    using IndexList = ValueList<IndexType, MaxActiveDimensions>;

    // Get a list of indices for active features
    static void append_active_indices(
      const Position& pos,
      Color perspective,
-      ValueListInserter<IndexType> active);
+      IndexList& active);

    // Get a list of indices for recently changed features
    static void append_changed_indices(
      Square ksq,
-      StateInfo* st,
+      const DirtyPiece& dp,
      Color perspective,
-      ValueListInserter<IndexType> removed,
-      ValueListInserter<IndexType> added);
+      IndexList& removed,
+      IndexList& added
+    );

    // Returns the cost of updating one perspective, the most costly one.
    // Assumes no refresh needed.
-    static int update_cost(StateInfo* st);
+    static int update_cost(const StateInfo* st);
    static int refresh_cost(const Position& pos);

    // Returns whether the change stored in this StateInfo means that
    // a full accumulator refresh is required.
-    static bool requires_refresh(StateInfo* st, Color perspective);
+    static bool requires_refresh(const StateInfo* st, Color perspective);
  };

 }  // namespace Stockfish::Eval::NNUE::Features
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -26,50 +26,41 @@
 namespace Stockfish::Eval::NNUE::Layers {

  // Clipped ReLU
-  template <typename PreviousLayer>
+  template <IndexType InDims>
  class ClippedReLU {
   public:
    // Input/output type
-    using InputType = typename PreviousLayer::OutputType;
+    using InputType = std::int32_t;
    using OutputType = std::uint8_t;
-    static_assert(std::is_same<InputType, std::int32_t>::value, "");

    // Number of input/output dimensions
-    static constexpr IndexType InputDimensions =
-        PreviousLayer::OutputDimensions;
+    static constexpr IndexType InputDimensions = InDims;
    static constexpr IndexType OutputDimensions = InputDimensions;
+    static constexpr IndexType PaddedOutputDimensions =
+        ceil_to_multiple<IndexType>(OutputDimensions, 32);

-    // Size of forward propagation buffer used in this layer
-    static constexpr std::size_t SelfBufferSize =
-        ceil_to_multiple(OutputDimensions * sizeof(OutputType), CacheLineSize);
-
-    // Size of the forward propagation buffer used from the input layer to this layer
-    static constexpr std::size_t BufferSize =
-        PreviousLayer::BufferSize + SelfBufferSize;
+    using OutputBuffer = OutputType[PaddedOutputDimensions];

    // Hash value embedded in the evaluation file
-    static constexpr std::uint32_t get_hash_value() {
+    static constexpr std::uint32_t get_hash_value(std::uint32_t prevHash) {
      std::uint32_t hashValue = 0x538D24C7u;
-      hashValue += PreviousLayer::get_hash_value();
+      hashValue += prevHash;
      return hashValue;
    }

    // Read network parameters
-    bool read_parameters(std::istream& stream) {
-      return previousLayer.read_parameters(stream);
+    bool read_parameters(std::istream&) {
+      return true;
    }

    // Write network parameters
-    bool write_parameters(std::ostream& stream) const {
-      return previousLayer.write_parameters(stream);
+    bool write_parameters(std::ostream&) const {
+      return true;
    }

    // Forward propagation
    const OutputType* propagate(
-        const TransformedFeatureType* transformedFeatures, char* buffer) const {
-      const auto input = previousLayer.propagate(
-          transformedFeatures, buffer + SelfBufferSize);
-      const auto output = reinterpret_cast<OutputType*>(buffer);
+        const InputType* input, OutputType* output) const {

  #if defined(USE_AVX2)
      if constexpr (InputDimensions % SimdWidth == 0) {
@@ -179,11 +170,9 @@ namespace Stockfish::Eval::NNUE::Layers {
        output[i] = static_cast<OutputType>(
            std::max(0, std::min(127, input[i] >> WeightScaleBits)));
      }
+
      return output;
    }
-
-   private:
-    PreviousLayer previousLayer;
  };

 }  // namespace Stockfish::Eval::NNUE::Layers
@@ -1,72 +0,0 @@
-/*
-  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
-  Stockfish is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 3 of the License, or
-  (at your option) any later version.
-
-  Stockfish is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-// NNUE evaluation function layer InputSlice definition
-
-#ifndef NNUE_LAYERS_INPUT_SLICE_H_INCLUDED
-#define NNUE_LAYERS_INPUT_SLICE_H_INCLUDED
-
-#include "../nnue_common.h"
-
-namespace Stockfish::Eval::NNUE::Layers {
-
-// Input layer
-template <IndexType OutDims, IndexType Offset = 0>
-class InputSlice {
- public:
-  // Need to maintain alignment
-  static_assert(Offset % MaxSimdWidth == 0, "");
-
-  // Output type
-  using OutputType = TransformedFeatureType;
-
-  // Output dimensionality
-  static constexpr IndexType OutputDimensions = OutDims;
-
-  // Size of forward propagation buffer used from the input layer to this layer
-  static constexpr std::size_t BufferSize = 0;
-
-  // Hash value embedded in the evaluation file
-  static constexpr std::uint32_t get_hash_value() {
-    std::uint32_t hashValue = 0xEC42E90Du;
-    hashValue ^= OutputDimensions ^ (Offset << 10);
-    return hashValue;
-  }
-
-  // Read network parameters
-  bool read_parameters(std::istream& /*stream*/) {
-    return true;
-  }
-
-  // Write network parameters
-  bool write_parameters(std::ostream& /*stream*/) const {
-    return true;
-  }
-  // Forward propagation
-  const OutputType* propagate(
-      const TransformedFeatureType* transformedFeatures,
-      char* /*buffer*/) const {
-    return transformedFeatures + Offset;
-  }
-
- private:
-};
-
-}  // namespace Stockfish::Eval::NNUE::Layers
-
-#endif // #ifndef NNUE_LAYERS_INPUT_SLICE_H_INCLUDED
@@ -0,0 +1,120 @@
+/*
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)
+
+  Stockfish is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Stockfish is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+// Definition of layer ClippedReLU of NNUE evaluation function
+
+#ifndef NNUE_LAYERS_SQR_CLIPPED_RELU_H_INCLUDED
+#define NNUE_LAYERS_SQR_CLIPPED_RELU_H_INCLUDED
+
+#include "../nnue_common.h"
+
+namespace Stockfish::Eval::NNUE::Layers {
+
+  // Clipped ReLU
+  template <IndexType InDims>
+  class SqrClippedReLU {
+   public:
+    // Input/output type
+    using InputType = std::int32_t;
+    using OutputType = std::uint8_t;
+
+    // Number of input/output dimensions
+    static constexpr IndexType InputDimensions = InDims;
+    static constexpr IndexType OutputDimensions = InputDimensions;
+    static constexpr IndexType PaddedOutputDimensions =
+        ceil_to_multiple<IndexType>(OutputDimensions, 32);
+
+    using OutputBuffer = OutputType[PaddedOutputDimensions];
+
+    // Hash value embedded in the evaluation file
+    static constexpr std::uint32_t get_hash_value(std::uint32_t prevHash) {
+      std::uint32_t hashValue = 0x538D24C7u;
+      hashValue += prevHash;
+      return hashValue;
+    }
+
+    // Read network parameters
+    bool read_parameters(std::istream&) {
+      return true;
+    }
+
+    // Write network parameters
+    bool write_parameters(std::ostream&) const {
+      return true;
+    }
+
+    // Forward propagation
+    const OutputType* propagate(
+        const InputType* input, OutputType* output) const {
+
+  #if defined(USE_SSE2)
+      constexpr IndexType NumChunks = InputDimensions / 16;
+
+  #ifdef USE_SSE41
+      const __m128i Zero = _mm_setzero_si128();
+  #else
+      const __m128i k0x80s = _mm_set1_epi8(-128);
+  #endif
+
+      static_assert(WeightScaleBits == 6);
+      const auto in = reinterpret_cast<const __m128i*>(input);
+      const auto out = reinterpret_cast<__m128i*>(output);
+      for (IndexType i = 0; i < NumChunks; ++i) {
+        __m128i words0 = _mm_packs_epi32(
+            _mm_load_si128(&in[i * 4 + 0]),
+            _mm_load_si128(&in[i * 4 + 1]));
+        __m128i words1 = _mm_packs_epi32(
+            _mm_load_si128(&in[i * 4 + 2]),
+            _mm_load_si128(&in[i * 4 + 3]));
+
+        // Not sure if
+        words0 = _mm_srli_epi16(_mm_mulhi_epi16(words0, words0), 3);
+        words1 = _mm_srli_epi16(_mm_mulhi_epi16(words1, words1), 3);
+
+        const __m128i packedbytes = _mm_packs_epi16(words0, words1);
+
+        _mm_store_si128(&out[i],
+
+  #ifdef USE_SSE41
+          _mm_max_epi8(packedbytes, Zero)
+  #else
+          _mm_subs_epi8(_mm_adds_epi8(packedbytes, k0x80s), k0x80s)
+  #endif
+
+        );
+      }
+      constexpr IndexType Start = NumChunks * 16;
+
+  #else
+      constexpr IndexType Start = 0;
+  #endif
+
+      for (IndexType i = Start; i < InputDimensions; ++i) {
+        output[i] = static_cast<OutputType>(
+            // realy should be /127 but we need to make it fast
+            // needs to be accounted for in the trainer
+            std::max(0ll, std::min(127ll, (((long long)input[i] * input[i]) >> (2 * WeightScaleBits)) / 128)));
+      }
+
+      return output;
+    }
+  };
+
+}  // namespace Stockfish::Eval::NNUE::Layers
+
+#endif // NNUE_LAYERS_SQR_CLIPPED_RELU_H_INCLUDED
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -21,39 +21,117 @@
 #ifndef NNUE_ARCHITECTURE_H_INCLUDED
 #define NNUE_ARCHITECTURE_H_INCLUDED

+#include <memory>
+
 #include "nnue_common.h"

 #include "features/half_ka_v2_hm.h"

-#include "layers/input_slice.h"
 #include "layers/affine_transform.h"
 #include "layers/clipped_relu.h"
+#include "layers/sqr_clipped_relu.h"
+
+#include "../misc.h"

 namespace Stockfish::Eval::NNUE {

-  // Input features used in evaluation function
-  using FeatureSet = Features::HalfKAv2_hm;
+// Input features used in evaluation function
+using FeatureSet = Features::HalfKAv2_hm;

-  // Number of input feature dimensions after conversion
-  constexpr IndexType TransformedFeatureDimensions = 1024;
-  constexpr IndexType PSQTBuckets = 8;
-  constexpr IndexType LayerStacks = 8;
+// Number of input feature dimensions after conversion
+constexpr IndexType TransformedFeatureDimensions = 1024;
+constexpr IndexType PSQTBuckets = 8;
+constexpr IndexType LayerStacks = 8;

-  namespace Layers {
+struct Network
+{
+  static constexpr int FC_0_OUTPUTS = 15;
+  static constexpr int FC_1_OUTPUTS = 32;

-    // Define network structure
-    using InputLayer = InputSlice<TransformedFeatureDimensions * 2>;
-    using HiddenLayer1 = ClippedReLU<AffineTransform<InputLayer, 8>>;
-    using HiddenLayer2 = ClippedReLU<AffineTransform<HiddenLayer1, 32>>;
-    using OutputLayer = AffineTransform<HiddenLayer2, 1>;
+  Layers::AffineTransform<TransformedFeatureDimensions, FC_0_OUTPUTS + 1> fc_0;
+  Layers::SqrClippedReLU<FC_0_OUTPUTS + 1> ac_sqr_0;
+  Layers::ClippedReLU<FC_0_OUTPUTS + 1> ac_0;
+  Layers::AffineTransform<FC_0_OUTPUTS * 2, FC_1_OUTPUTS> fc_1;
+  Layers::ClippedReLU<FC_1_OUTPUTS> ac_1;
+  Layers::AffineTransform<FC_1_OUTPUTS, 1> fc_2;

-  }  // namespace Layers
+  // Hash value embedded in the evaluation file
+  static constexpr std::uint32_t get_hash_value() {
+    // input slice hash
+    std::uint32_t hashValue = 0xEC42E90Du;
+    hashValue ^= TransformedFeatureDimensions * 2;

-  using Network = Layers::OutputLayer;
+    hashValue = decltype(fc_0)::get_hash_value(hashValue);
+    hashValue = decltype(ac_0)::get_hash_value(hashValue);
+    hashValue = decltype(fc_1)::get_hash_value(hashValue);
+    hashValue = decltype(ac_1)::get_hash_value(hashValue);
+    hashValue = decltype(fc_2)::get_hash_value(hashValue);

-  static_assert(TransformedFeatureDimensions % MaxSimdWidth == 0, "");
-  static_assert(Network::OutputDimensions == 1, "");
-  static_assert(std::is_same<Network::OutputType, std::int32_t>::value, "");
+    return hashValue;
+  }
+
+  // Read network parameters
+  bool read_parameters(std::istream& stream) {
+    if (!fc_0.read_parameters(stream)) return false;
+    if (!ac_0.read_parameters(stream)) return false;
+    if (!fc_1.read_parameters(stream)) return false;
+    if (!ac_1.read_parameters(stream)) return false;
+    if (!fc_2.read_parameters(stream)) return false;
+    return true;
+  }
+
+  // Read network parameters
+  bool write_parameters(std::ostream& stream) const {
+    if (!fc_0.write_parameters(stream)) return false;
+    if (!ac_0.write_parameters(stream)) return false;
+    if (!fc_1.write_parameters(stream)) return false;
+    if (!ac_1.write_parameters(stream)) return false;
+    if (!fc_2.write_parameters(stream)) return false;
+    return true;
+  }
+
+  std::int32_t propagate(const TransformedFeatureType* transformedFeatures)
+  {
+    struct alignas(CacheLineSize) Buffer
+    {
+      alignas(CacheLineSize) decltype(fc_0)::OutputBuffer fc_0_out;
+      alignas(CacheLineSize) decltype(ac_sqr_0)::OutputType ac_sqr_0_out[ceil_to_multiple<IndexType>(FC_0_OUTPUTS * 2, 32)];
+      alignas(CacheLineSize) decltype(ac_0)::OutputBuffer ac_0_out;
+      alignas(CacheLineSize) decltype(fc_1)::OutputBuffer fc_1_out;
+      alignas(CacheLineSize) decltype(ac_1)::OutputBuffer ac_1_out;
+      alignas(CacheLineSize) decltype(fc_2)::OutputBuffer fc_2_out;
+
+      Buffer()
+      {
+          std::memset(this, 0, sizeof(*this));
+      }
+    };
+
+#if defined(__clang__) && (__APPLE__)
+    // workaround for a bug reported with xcode 12
+    static thread_local auto tlsBuffer = std::make_unique<Buffer>();
+    // Access TLS only once, cache result.
+    Buffer& buffer = *tlsBuffer;
+#else
+    alignas(CacheLineSize) static thread_local Buffer buffer;
+#endif
+
+    fc_0.propagate(transformedFeatures, buffer.fc_0_out);
+    ac_sqr_0.propagate(buffer.fc_0_out, buffer.ac_sqr_0_out);
+    ac_0.propagate(buffer.fc_0_out, buffer.ac_0_out);
+    std::memcpy(buffer.ac_sqr_0_out + FC_0_OUTPUTS, buffer.ac_0_out, FC_0_OUTPUTS * sizeof(decltype(ac_0)::OutputType));
+    fc_1.propagate(buffer.ac_sqr_0_out, buffer.fc_1_out);
+    ac_1.propagate(buffer.fc_1_out, buffer.ac_1_out);
+    fc_2.propagate(buffer.ac_1_out, buffer.fc_2_out);
+
+    // buffer.fc_0_out[FC_0_OUTPUTS] is such that 1.0 is equal to 127*(1<<WeightScaleBits) in quantized form
+    // but we want 1.0 to be equal to 600*OutputScale
+    std::int32_t fwdOut = int(buffer.fc_0_out[FC_0_OUTPUTS]) * (600*OutputScale) / (127*(1<<WeightScaleBits));
+    std::int32_t outputValue = buffer.fc_2_out[0] + fwdOut;
+
+    return outputValue;
+  }
+};

 }  // namespace Stockfish::Eval::NNUE

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -111,7 +111,7 @@ namespace Stockfish::Eval::NNUE {

  // write_little_endian() is our utility to write an integer (signed or unsigned, any size)
  // to a stream in little-endian order. We swap the byte order before the write if
-  // necessary to always write in little endian order, independantly of the byte
+  // necessary to always write in little endian order, independently of the byte
  // ordering of the compiling machine.
  template <typename IntType>
  inline void write_little_endian(std::ostream& stream, IntType value) {
@@ -129,11 +129,11 @@ namespace Stockfish::Eval::NNUE {
          {
            for (; i + 1 < sizeof(IntType); ++i)
            {
-                u[i] = v;
+                u[i] = (std::uint8_t)v;
                v >>= 8;
            }
          }
-          u[i] = v;
+          u[i] = (std::uint8_t)v;

          stream.write(reinterpret_cast<char*>(u), sizeof(IntType));
      }
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -50,12 +50,22 @@ namespace Stockfish::Eval::NNUE {
  #define vec_store(a,b) _mm512_store_si512(a,b)
  #define vec_add_16(a,b) _mm512_add_epi16(a,b)
  #define vec_sub_16(a,b) _mm512_sub_epi16(a,b)
+  #define vec_mul_16(a,b) _mm512_mullo_epi16(a,b)
+  #define vec_zero() _mm512_setzero_epi32()
+  #define vec_set_16(a) _mm512_set1_epi16(a)
+  #define vec_max_16(a,b) _mm512_max_epi16(a,b)
+  #define vec_min_16(a,b) _mm512_min_epi16(a,b)
+  inline vec_t vec_msb_pack_16(vec_t a, vec_t b){
+    vec_t compacted = _mm512_packs_epi16(_mm512_srli_epi16(a,7),_mm512_srli_epi16(b,7));
+    return _mm512_permutexvar_epi64(_mm512_setr_epi64(0, 2, 4, 6, 1, 3, 5, 7), compacted);
+  }
  #define vec_load_psqt(a) _mm256_load_si256(a)
  #define vec_store_psqt(a,b) _mm256_store_si256(a,b)
  #define vec_add_psqt_32(a,b) _mm256_add_epi32(a,b)
  #define vec_sub_psqt_32(a,b) _mm256_sub_epi32(a,b)
  #define vec_zero_psqt() _mm256_setzero_si256()
  #define NumRegistersSIMD 32
+  #define MaxChunkSize 64

  #elif USE_AVX2
  typedef __m256i vec_t;
@@ -64,12 +74,22 @@ namespace Stockfish::Eval::NNUE {
  #define vec_store(a,b) _mm256_store_si256(a,b)
  #define vec_add_16(a,b) _mm256_add_epi16(a,b)
  #define vec_sub_16(a,b) _mm256_sub_epi16(a,b)
+  #define vec_mul_16(a,b) _mm256_mullo_epi16(a,b)
+  #define vec_zero() _mm256_setzero_si256()
+  #define vec_set_16(a) _mm256_set1_epi16(a)
+  #define vec_max_16(a,b) _mm256_max_epi16(a,b)
+  #define vec_min_16(a,b) _mm256_min_epi16(a,b)
+  inline vec_t vec_msb_pack_16(vec_t a, vec_t b){
+    vec_t compacted = _mm256_packs_epi16(_mm256_srli_epi16(a,7), _mm256_srli_epi16(b,7));
+    return _mm256_permute4x64_epi64(compacted, 0b11011000);
+  }
  #define vec_load_psqt(a) _mm256_load_si256(a)
  #define vec_store_psqt(a,b) _mm256_store_si256(a,b)
  #define vec_add_psqt_32(a,b) _mm256_add_epi32(a,b)
  #define vec_sub_psqt_32(a,b) _mm256_sub_epi32(a,b)
  #define vec_zero_psqt() _mm256_setzero_si256()
  #define NumRegistersSIMD 16
+  #define MaxChunkSize 32

  #elif USE_SSE2
  typedef __m128i vec_t;
@@ -78,12 +98,19 @@ namespace Stockfish::Eval::NNUE {
  #define vec_store(a,b) *(a)=(b)
  #define vec_add_16(a,b) _mm_add_epi16(a,b)
  #define vec_sub_16(a,b) _mm_sub_epi16(a,b)
+  #define vec_mul_16(a,b) _mm_mullo_epi16(a,b)
+  #define vec_zero() _mm_setzero_si128()
+  #define vec_set_16(a) _mm_set1_epi16(a)
+  #define vec_max_16(a,b) _mm_max_epi16(a,b)
+  #define vec_min_16(a,b) _mm_min_epi16(a,b)
+  #define vec_msb_pack_16(a,b) _mm_packs_epi16(_mm_srli_epi16(a,7),_mm_srli_epi16(b,7))
  #define vec_load_psqt(a) (*(a))
  #define vec_store_psqt(a,b) *(a)=(b)
  #define vec_add_psqt_32(a,b) _mm_add_epi32(a,b)
  #define vec_sub_psqt_32(a,b) _mm_sub_epi32(a,b)
  #define vec_zero_psqt() _mm_setzero_si128()
  #define NumRegistersSIMD (Is64Bit ? 16 : 8)
+  #define MaxChunkSize 16

  #elif USE_MMX
  typedef __m64 vec_t;
@@ -92,12 +119,26 @@ namespace Stockfish::Eval::NNUE {
  #define vec_store(a,b) *(a)=(b)
  #define vec_add_16(a,b) _mm_add_pi16(a,b)
  #define vec_sub_16(a,b) _mm_sub_pi16(a,b)
+  #define vec_mul_16(a,b) _mm_mullo_pi16(a,b)
+  #define vec_zero() _mm_setzero_si64()
+  #define vec_set_16(a) _mm_set1_pi16(a)
+  inline vec_t vec_max_16(vec_t a,vec_t b){
+    vec_t comparison = _mm_cmpgt_pi16(a,b);
+    return _mm_or_si64(_mm_and_si64(comparison, a), _mm_andnot_si64(comparison, b));
+  }
+  inline vec_t vec_min_16(vec_t a,vec_t b){
+    vec_t comparison = _mm_cmpgt_pi16(a,b);
+    return _mm_or_si64(_mm_and_si64(comparison, b), _mm_andnot_si64(comparison, a));
+  }
+  #define vec_msb_pack_16(a,b) _mm_packs_pi16(_mm_srli_pi16(a,7),_mm_srli_pi16(b,7))
  #define vec_load_psqt(a) (*(a))
  #define vec_store_psqt(a,b) *(a)=(b)
  #define vec_add_psqt_32(a,b) _mm_add_pi32(a,b)
  #define vec_sub_psqt_32(a,b) _mm_sub_pi32(a,b)
  #define vec_zero_psqt() _mm_setzero_si64()
+  #define vec_cleanup() _mm_empty()
  #define NumRegistersSIMD 8
+  #define MaxChunkSize 8

  #elif USE_NEON
  typedef int16x8_t vec_t;
@@ -106,12 +147,24 @@ namespace Stockfish::Eval::NNUE {
  #define vec_store(a,b) *(a)=(b)
  #define vec_add_16(a,b) vaddq_s16(a,b)
  #define vec_sub_16(a,b) vsubq_s16(a,b)
+  #define vec_mul_16(a,b) vmulq_s16(a,b)
+  #define vec_zero() vec_t{0}
+  #define vec_set_16(a) vdupq_n_s16(a)
+  #define vec_max_16(a,b) vmaxq_s16(a,b)
+  #define vec_min_16(a,b) vminq_s16(a,b)
+  inline vec_t vec_msb_pack_16(vec_t a, vec_t b){
+    const int8x8_t shifta = vshrn_n_s16(a, 7);
+    const int8x8_t shiftb = vshrn_n_s16(b, 7);
+    const int8x16_t compacted = vcombine_s8(shifta,shiftb);
+    return *reinterpret_cast<const vec_t*> (&compacted);
+  }
  #define vec_load_psqt(a) (*(a))
  #define vec_store_psqt(a,b) *(a)=(b)
  #define vec_add_psqt_32(a,b) vaddq_s32(a,b)
  #define vec_sub_psqt_32(a,b) vsubq_s32(a,b)
  #define vec_zero_psqt() psqt_vec_t{0}
  #define NumRegistersSIMD 16
+  #define MaxChunkSize 16

  #else
  #undef VECTOR
@@ -126,8 +179,10 @@ namespace Stockfish::Eval::NNUE {
      // We use __m* types as template arguments, which causes GCC to emit warnings
      // about losing some attribute information. This is irrelevant to us as we
      // only take their size, so the following pragma are harmless.
+      #if defined(__GNUC__)
      #pragma GCC diagnostic push
      #pragma GCC diagnostic ignored "-Wignored-attributes"
+      #endif

      template <typename SIMDRegisterType,
                typename LaneType,
@@ -159,9 +214,9 @@ namespace Stockfish::Eval::NNUE {

      static constexpr int NumRegs     = BestRegisterCount<vec_t, WeightType, TransformedFeatureDimensions, NumRegistersSIMD>();
      static constexpr int NumPsqtRegs = BestRegisterCount<psqt_vec_t, PSQTWeightType, PSQTBuckets, NumRegistersSIMD>();
-
+      #if defined(__GNUC__)
      #pragma GCC diagnostic pop
-
+      #endif
  #endif


@@ -186,7 +241,7 @@ namespace Stockfish::Eval::NNUE {

    // Number of input/output dimensions
    static constexpr IndexType InputDimensions = FeatureSet::Dimensions;
-    static constexpr IndexType OutputDimensions = HalfDimensions * 2;
+    static constexpr IndexType OutputDimensions = HalfDimensions;

    // Size of forward propagation buffer
    static constexpr std::size_t BufferSize =
@@ -194,7 +249,7 @@ namespace Stockfish::Eval::NNUE {

    // Hash value embedded in the evaluation file
    static constexpr std::uint32_t get_hash_value() {
-      return FeatureSet::HashValue ^ OutputDimensions;
+      return FeatureSet::HashValue ^ (OutputDimensions * 2);
    }

    // Read network parameters
@@ -232,136 +287,55 @@ namespace Stockfish::Eval::NNUE {
        ) / 2;


-  #if defined(USE_AVX512)
-
-      constexpr IndexType NumChunks = HalfDimensions / (SimdWidth * 2);
-      static_assert(HalfDimensions % (SimdWidth * 2) == 0);
-      const __m512i Control = _mm512_setr_epi64(0, 2, 4, 6, 1, 3, 5, 7);
-      const __m512i Zero = _mm512_setzero_si512();
-
      for (IndexType p = 0; p < 2; ++p)
      {
-          const IndexType offset = HalfDimensions * p;
-          auto out = reinterpret_cast<__m512i*>(&output[offset]);
-          for (IndexType j = 0; j < NumChunks; ++j)
+          const IndexType offset = (HalfDimensions / 2) * p;
+
+#if defined(VECTOR)
+
+          constexpr IndexType OutputChunkSize = MaxChunkSize;
+          static_assert((HalfDimensions / 2) % OutputChunkSize == 0);
+          constexpr IndexType NumOutputChunks = HalfDimensions / 2 / OutputChunkSize;
+
+          vec_t Zero = vec_zero();
+          vec_t One = vec_set_16(127);
+
+          const vec_t* in0 = reinterpret_cast<const vec_t*>(&(accumulation[perspectives[p]][0]));
+          const vec_t* in1 = reinterpret_cast<const vec_t*>(&(accumulation[perspectives[p]][HalfDimensions / 2]));
+                vec_t* out = reinterpret_cast<      vec_t*>(output + offset);
+
+          for (IndexType j = 0; j < NumOutputChunks; j += 1)
          {
-              __m512i sum0 = _mm512_load_si512(&reinterpret_cast<const __m512i*>
-                                              (accumulation[perspectives[p]])[j * 2 + 0]);
-              __m512i sum1 = _mm512_load_si512(&reinterpret_cast<const __m512i*>
-                                              (accumulation[perspectives[p]])[j * 2 + 1]);
+              const vec_t sum0a = vec_max_16(vec_min_16(in0[j * 2 + 0], One), Zero);
+              const vec_t sum0b = vec_max_16(vec_min_16(in0[j * 2 + 1], One), Zero);
+              const vec_t sum1a = vec_max_16(vec_min_16(in1[j * 2 + 0], One), Zero);
+              const vec_t sum1b = vec_max_16(vec_min_16(in1[j * 2 + 1], One), Zero);

-              _mm512_store_si512(&out[j], _mm512_permutexvar_epi64(Control,
-                                 _mm512_max_epi8(_mm512_packs_epi16(sum0, sum1), Zero)));
+              const vec_t pa = vec_mul_16(sum0a, sum1a);
+              const vec_t pb = vec_mul_16(sum0b, sum1b);
+
+              out[j] = vec_msb_pack_16(pa, pb);
          }
-      }
-      return psqt;

-  #elif defined(USE_AVX2)
+#else

-      constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
-      constexpr int Control = 0b11011000;
-      const __m256i Zero = _mm256_setzero_si256();
-
-      for (IndexType p = 0; p < 2; ++p)
-      {
-          const IndexType offset = HalfDimensions * p;
-          auto out = reinterpret_cast<__m256i*>(&output[offset]);
-          for (IndexType j = 0; j < NumChunks; ++j)
-          {
-              __m256i sum0 = _mm256_load_si256(&reinterpret_cast<const __m256i*>
-                                              (accumulation[perspectives[p]])[j * 2 + 0]);
-              __m256i sum1 = _mm256_load_si256(&reinterpret_cast<const __m256i*>
-                                              (accumulation[perspectives[p]])[j * 2 + 1]);
-
-              _mm256_store_si256(&out[j], _mm256_permute4x64_epi64(
-                                 _mm256_max_epi8(_mm256_packs_epi16(sum0, sum1), Zero), Control));
+          for (IndexType j = 0; j < HalfDimensions / 2; ++j) {
+              BiasType sum0 = accumulation[static_cast<int>(perspectives[p])][j + 0];
+              BiasType sum1 = accumulation[static_cast<int>(perspectives[p])][j + HalfDimensions / 2];
+              sum0 = std::max<int>(0, std::min<int>(127, sum0));
+              sum1 = std::max<int>(0, std::min<int>(127, sum1));
+              output[offset + j] = static_cast<OutputType>(sum0 * sum1 / 128);
          }
+
+#endif
      }
+
+#if defined(vec_cleanup)
+      vec_cleanup();
+#endif
+
      return psqt;

-  #elif defined(USE_SSE2)
-
-      #ifdef USE_SSE41
-      constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
-      const __m128i Zero = _mm_setzero_si128();
-      #else
-      constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
-      const __m128i k0x80s = _mm_set1_epi8(-128);
-      #endif
-
-      for (IndexType p = 0; p < 2; ++p)
-      {
-          const IndexType offset = HalfDimensions * p;
-          auto out = reinterpret_cast<__m128i*>(&output[offset]);
-          for (IndexType j = 0; j < NumChunks; ++j)
-          {
-              __m128i sum0 = _mm_load_si128(&reinterpret_cast<const __m128i*>
-                                           (accumulation[perspectives[p]])[j * 2 + 0]);
-              __m128i sum1 = _mm_load_si128(&reinterpret_cast<const __m128i*>
-                                           (accumulation[perspectives[p]])[j * 2 + 1]);
-              const __m128i packedbytes = _mm_packs_epi16(sum0, sum1);
-
-              #ifdef USE_SSE41
-              _mm_store_si128(&out[j], _mm_max_epi8(packedbytes, Zero));
-              #else
-              _mm_store_si128(&out[j], _mm_subs_epi8(_mm_adds_epi8(packedbytes, k0x80s), k0x80s));
-              #endif
-          }
-      }
-      return psqt;
-
-  #elif defined(USE_MMX)
-
-      constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
-      const __m64 k0x80s = _mm_set1_pi8(-128);
-
-      for (IndexType p = 0; p < 2; ++p)
-      {
-          const IndexType offset = HalfDimensions * p;
-          auto out = reinterpret_cast<__m64*>(&output[offset]);
-          for (IndexType j = 0; j < NumChunks; ++j)
-          {
-              __m64 sum0 = *(&reinterpret_cast<const __m64*>(accumulation[perspectives[p]])[j * 2 + 0]);
-              __m64 sum1 = *(&reinterpret_cast<const __m64*>(accumulation[perspectives[p]])[j * 2 + 1]);
-              const __m64 packedbytes = _mm_packs_pi16(sum0, sum1);
-              out[j] = _mm_subs_pi8(_mm_adds_pi8(packedbytes, k0x80s), k0x80s);
-          }
-      }
-      _mm_empty();
-      return psqt;
-
-  #elif defined(USE_NEON)
-
-      constexpr IndexType NumChunks = HalfDimensions / (SimdWidth / 2);
-      const int8x8_t Zero = {0};
-
-      for (IndexType p = 0; p < 2; ++p)
-      {
-          const IndexType offset = HalfDimensions * p;
-          const auto out = reinterpret_cast<int8x8_t*>(&output[offset]);
-          for (IndexType j = 0; j < NumChunks; ++j)
-          {
-              int16x8_t sum = reinterpret_cast<const int16x8_t*>(accumulation[perspectives[p]])[j];
-              out[j] = vmax_s8(vqmovn_s16(sum), Zero);
-          }
-      }
-      return psqt;
-
-  #else
-
-      for (IndexType p = 0; p < 2; ++p)
-      {
-          const IndexType offset = HalfDimensions * p;
-          for (IndexType j = 0; j < HalfDimensions; ++j)
-          {
-              BiasType sum = accumulation[perspectives[p]][j];
-              output[offset + j] = static_cast<OutputType>(std::max<int>(0, std::min<int>(127, sum)));
-          }
-      }
-      return psqt;
-
-  #endif
-
   } // end of function transform()


@@ -373,7 +347,6 @@ namespace Stockfish::Eval::NNUE {
      // That might depend on the feature set and generally relies on the
      // feature set's update cost calculation to be correct and never
      // allow updates with more added/removed features than MaxActiveDimensions.
-      using IndexList = ValueList<IndexType, FeatureSet::MaxActiveDimensions>;

  #ifdef VECTOR
      // Gcc-10.2 unnecessarily spills AVX2 registers if this array
@@ -407,12 +380,12 @@ namespace Stockfish::Eval::NNUE {

        // Gather all features to be updated.
        const Square ksq = pos.square<KING>(perspective);
-        IndexList removed[2], added[2];
+        FeatureSet::IndexList removed[2], added[2];
        FeatureSet::append_changed_indices(
-          ksq, next, perspective, removed[0], added[0]);
+          ksq, next->dirtyPiece, perspective, removed[0], added[0]);
        for (StateInfo *st2 = pos.state(); st2 != next; st2 = st2->previous)
          FeatureSet::append_changed_indices(
-            ksq, st2, perspective, removed[1], added[1]);
+            ksq, st2->dirtyPiece, perspective, removed[1], added[1]);

        // Mark the accumulators as computed.
        next->accumulator.computed[perspective] = true;
@@ -537,7 +510,7 @@ namespace Stockfish::Eval::NNUE {
        // Refresh the accumulator
        auto& accumulator = pos.state()->accumulator;
        accumulator.computed[perspective] = true;
-        IndexList active;
+        FeatureSet::IndexList active;
        FeatureSet::append_active_indices(pos, perspective, active);

  #ifdef VECTOR
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -32,30 +32,30 @@ namespace {
  #define S(mg, eg) make_score(mg, eg)

  // Pawn penalties
-  constexpr Score Backward      = S( 9, 22);
-  constexpr Score Doubled       = S(13, 51);
-  constexpr Score DoubledEarly  = S(20,  7);
-  constexpr Score Isolated      = S( 3, 15);
-  constexpr Score WeakLever     = S( 4, 58);
-  constexpr Score WeakUnopposed = S(13, 24);
+  constexpr Score Backward      = S( 6, 19);
+  constexpr Score Doubled       = S(11, 51);
+  constexpr Score DoubledEarly  = S(17,  7);
+  constexpr Score Isolated      = S( 1, 20);
+  constexpr Score WeakLever     = S( 2, 57);
+  constexpr Score WeakUnopposed = S(15, 18);

  // Bonus for blocked pawns at 5th or 6th rank
-  constexpr Score BlockedPawn[2] = { S(-17, -6), S(-9, 2) };
+  constexpr Score BlockedPawn[2] = { S(-19, -8), S(-7, 3) };

  constexpr Score BlockedStorm[RANK_NB] = {
-    S(0, 0), S(0, 0), S(75, 78), S(-8, 16), S(-6, 10), S(-6, 6), S(0, 2)
+    S(0, 0), S(0, 0), S(64, 75), S(-3, 14), S(-12, 19), S(-7, 4), S(-10, 5)
  };

  // Connected pawn bonus
-  constexpr int Connected[RANK_NB] = { 0, 5, 7, 11, 23, 48, 87 };
+  constexpr int Connected[RANK_NB] = { 0, 3, 7, 7, 15, 54, 86 };

  // Strength of pawn shelter for our king by [distance from edge][rank].
  // RANK_1 = 0 is used for files where we have no pawn, or pawn is behind our king.
  constexpr Value ShelterStrength[int(FILE_NB) / 2][RANK_NB] = {
-    { V( -5), V( 82), V( 92), V( 54), V( 36), V( 22), V(  28) },
-    { V(-44), V( 63), V( 33), V(-50), V(-30), V(-12), V( -62) },
-    { V(-11), V( 77), V( 22), V( -6), V( 31), V(  8), V( -45) },
-    { V(-39), V(-12), V(-29), V(-50), V(-43), V(-68), V(-164) }
+    { V(-2), V(85), V(95), V(53), V(39), V(23), V(25) },
+    { V(-55), V(64), V(32), V(-55), V(-30), V(-11), V(-61) },
+    { V(-11), V(75), V(19), V(-6), V(26), V(9), V(-47) },
+    { V(-41), V(-11), V(-27), V(-58), V(-42), V(-66), V(-163) }
  };

  // Danger of enemy pawns moving toward our king by [distance from edge][rank].
@@ -63,17 +63,17 @@ namespace {
  // is behind our king. Note that UnblockedStorm[0][1-2] accommodate opponent pawn
  // on edge, likely blocked by our king.
  constexpr Value UnblockedStorm[int(FILE_NB) / 2][RANK_NB] = {
-    { V( 87), V(-288), V(-168), V( 96), V( 47), V( 44), V( 46) },
-    { V( 42), V( -25), V( 120), V( 45), V( 34), V( -9), V( 24) },
-    { V( -8), V(  51), V( 167), V( 35), V( -4), V(-16), V(-12) },
-    { V(-17), V( -13), V( 100), V(  4), V(  9), V(-16), V(-31) }
+    { V(94), V(-280), V(-170), V(90), V(59), V(47), V(53) },
+    { V(43), V(-17), V(128), V(39), V(26), V(-17), V(15) },
+    { V(-9), V(62), V(170), V(34), V(-5), V(-20), V(-11) },
+    { V(-27), V(-19), V(106), V(10), V(2), V(-13), V(-24) }
  };


  // KingOnFile[semi-open Us][semi-open Them] contains bonuses/penalties
  // for king when the king is on a semi-open or open file.
-  constexpr Score KingOnFile[2][2] = {{ S(-21,10), S(-7, 1)  },
-                                     {  S(  0,-3), S( 9,-4) }};
+  constexpr Score KingOnFile[2][2] = {{ S(-18,11), S(-6,-3)  },
+                                     {  S(  0, 0), S( 5,-4) }};

  #undef S
  #undef V
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1019,9 +1019,9 @@ void Position::do_null_move(StateInfo& newSt) {
  }

  st->key ^= Zobrist::side;
+  ++st->rule50;
  prefetch(TT.first_entry(key()));

-  ++st->rule50;
  st->pliesFromNull = 0;

  sideToMove = ~sideToMove;
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -123,6 +123,7 @@ public:
  Bitboard attackers_to(Square s) const;
  Bitboard attackers_to(Square s, Bitboard occupied) const;
  Bitboard slider_blockers(Bitboard sliders, Square s, Bitboard& pinners) const;
+  template<PieceType Pt> Bitboard attacks_by(Color c) const;

  // Properties of moves
  bool legal(Move m) const;
@@ -312,6 +313,22 @@ inline Bitboard Position::attackers_to(Square s) const {
  return attackers_to(s, pieces());
 }

+template<PieceType Pt>
+inline Bitboard Position::attacks_by(Color c) const {
+
+  if constexpr (Pt == PAWN)
+      return c == WHITE ? pawn_attacks_bb<WHITE>(pieces(WHITE, PAWN))
+                        : pawn_attacks_bb<BLACK>(pieces(BLACK, PAWN));
+  else
+  {
+      Bitboard threats = 0;
+      Bitboard attackers = pieces(c, Pt);
+      while (attackers)
+          threats |= attacks_bb<Pt>(pop_lsb(attackers), pieces());
+      return threats;
+  }
+}
+
 inline Bitboard Position::checkers() const {
  return st->checkersBB;
 }
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -55,6 +55,7 @@ struct Stack {
  bool ttPv;
  bool ttHit;
  int doubleExtensions;
+  int cutoffCnt;
 };


@@ -74,6 +75,7 @@ struct RootMove {

  Value score = -VALUE_INFINITE;
  Value previousScore = -VALUE_INFINITE;
+  Value averageScore = -VALUE_INFINITE;
  int selDepth = 0;
  int tbRank = 0;
  Value tbScore;
@@ -0,0 +1,387 @@
+/*
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)
+
+  Stockfish is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Stockfish is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef STOCKFISH_SIMD_H_INCLUDED
+#define STOCKFISH_SIMD_H_INCLUDED
+
+#if defined(USE_AVX2)
+# include <immintrin.h>
+
+#elif defined(USE_SSE41)
+# include <smmintrin.h>
+
+#elif defined(USE_SSSE3)
+# include <tmmintrin.h>
+
+#elif defined(USE_SSE2)
+# include <emmintrin.h>
+
+#elif defined(USE_MMX)
+# include <mmintrin.h>
+
+#elif defined(USE_NEON)
+# include <arm_neon.h>
+#endif
+
+// The inline asm is only safe for GCC, where it is necessary to get good codegen.
+// See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101693
+// Clang does fine without it.
+// Play around here: https://godbolt.org/z/7EWqrYq51
+#if (defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER))
+#define USE_INLINE_ASM
+#endif
+
+// Use either the AVX512 or AVX-VNNI version of the VNNI instructions.
+#if defined(USE_AVXVNNI)
+#define VNNI_PREFIX "%{vex%} "
+#else
+#define VNNI_PREFIX ""
+#endif
+
+namespace Stockfish::Simd {
+
+#if defined (USE_AVX512)
+
+    [[maybe_unused]] static int m512_hadd(__m512i sum, int bias) {
+      return _mm512_reduce_add_epi32(sum) + bias;
+    }
+
+    /*
+      Parameters:
+        sum0 = [zmm0.i128[0], zmm0.i128[1], zmm0.i128[2], zmm0.i128[3]]
+        sum1 = [zmm1.i128[0], zmm1.i128[1], zmm1.i128[2], zmm1.i128[3]]
+        sum2 = [zmm2.i128[0], zmm2.i128[1], zmm2.i128[2], zmm2.i128[3]]
+        sum3 = [zmm3.i128[0], zmm3.i128[1], zmm3.i128[2], zmm3.i128[3]]
+
+      Returns:
+        ret = [
+          reduce_add_epi32(zmm0.i128[0]), reduce_add_epi32(zmm1.i128[0]), reduce_add_epi32(zmm2.i128[0]), reduce_add_epi32(zmm3.i128[0]),
+          reduce_add_epi32(zmm0.i128[1]), reduce_add_epi32(zmm1.i128[1]), reduce_add_epi32(zmm2.i128[1]), reduce_add_epi32(zmm3.i128[1]),
+          reduce_add_epi32(zmm0.i128[2]), reduce_add_epi32(zmm1.i128[2]), reduce_add_epi32(zmm2.i128[2]), reduce_add_epi32(zmm3.i128[2]),
+          reduce_add_epi32(zmm0.i128[3]), reduce_add_epi32(zmm1.i128[3]), reduce_add_epi32(zmm2.i128[3]), reduce_add_epi32(zmm3.i128[3])
+        ]
+    */
+    [[maybe_unused]] static __m512i m512_hadd128x16_interleave(
+        __m512i sum0, __m512i sum1, __m512i sum2, __m512i sum3) {
+
+      __m512i sum01a = _mm512_unpacklo_epi32(sum0, sum1);
+      __m512i sum01b = _mm512_unpackhi_epi32(sum0, sum1);
+
+      __m512i sum23a = _mm512_unpacklo_epi32(sum2, sum3);
+      __m512i sum23b = _mm512_unpackhi_epi32(sum2, sum3);
+
+      __m512i sum01 = _mm512_add_epi32(sum01a, sum01b);
+      __m512i sum23 = _mm512_add_epi32(sum23a, sum23b);
+
+      __m512i sum0123a = _mm512_unpacklo_epi64(sum01, sum23);
+      __m512i sum0123b = _mm512_unpackhi_epi64(sum01, sum23);
+
+      return _mm512_add_epi32(sum0123a, sum0123b);
+    }
+
+    [[maybe_unused]] static __m128i m512_haddx4(
+        __m512i sum0, __m512i sum1, __m512i sum2, __m512i sum3,
+        __m128i bias) {
+
+      __m512i sum = m512_hadd128x16_interleave(sum0, sum1, sum2, sum3);
+
+      __m256i sum256lo = _mm512_castsi512_si256(sum);
+      __m256i sum256hi = _mm512_extracti64x4_epi64(sum, 1);
+
+      sum256lo = _mm256_add_epi32(sum256lo, sum256hi);
+
+      __m128i sum128lo = _mm256_castsi256_si128(sum256lo);
+      __m128i sum128hi = _mm256_extracti128_si256(sum256lo, 1);
+
+      return _mm_add_epi32(_mm_add_epi32(sum128lo, sum128hi), bias);
+    }
+
+    [[maybe_unused]] static void m512_add_dpbusd_epi32(
+        __m512i& acc,
+        __m512i a,
+        __m512i b) {
+
+# if defined (USE_VNNI)
+#   if defined (USE_INLINE_ASM)
+      asm(
+        "vpdpbusd %[b], %[a], %[acc]\n\t"
+        : [acc]"+v"(acc)
+        : [a]"v"(a), [b]"vm"(b)
+      );
+#   else
+      acc = _mm512_dpbusd_epi32(acc, a, b);
+#   endif
+# else
+#   if defined (USE_INLINE_ASM)
+      __m512i tmp = _mm512_maddubs_epi16(a, b);
+      asm(
+          "vpmaddwd    %[tmp], %[ones], %[tmp]\n\t"
+          "vpaddd      %[acc], %[tmp], %[acc]\n\t"
+          : [acc]"+v"(acc), [tmp]"+&v"(tmp)
+          : [ones]"v"(_mm512_set1_epi16(1))
+      );
+#   else
+      __m512i product0 = _mm512_maddubs_epi16(a, b);
+      product0 = _mm512_madd_epi16(product0, _mm512_set1_epi16(1));
+      acc = _mm512_add_epi32(acc, product0);
+#   endif
+# endif
+    }
+
+    [[maybe_unused]] static void m512_add_dpbusd_epi32x2(
+        __m512i& acc,
+        __m512i a0, __m512i b0,
+        __m512i a1, __m512i b1) {
+
+# if defined (USE_VNNI)
+#   if defined (USE_INLINE_ASM)
+      asm(
+        "vpdpbusd %[b0], %[a0], %[acc]\n\t"
+        "vpdpbusd %[b1], %[a1], %[acc]\n\t"
+        : [acc]"+v"(acc)
+        : [a0]"v"(a0), [b0]"vm"(b0), [a1]"v"(a1), [b1]"vm"(b1)
+      );
+#   else
+      acc = _mm512_dpbusd_epi32(acc, a0, b0);
+      acc = _mm512_dpbusd_epi32(acc, a1, b1);
+#   endif
+# else
+#   if defined (USE_INLINE_ASM)
+      __m512i tmp0 = _mm512_maddubs_epi16(a0, b0);
+      __m512i tmp1 = _mm512_maddubs_epi16(a1, b1);
+      asm(
+          "vpaddsw     %[tmp0], %[tmp1], %[tmp0]\n\t"
+          "vpmaddwd    %[tmp0], %[ones], %[tmp0]\n\t"
+          "vpaddd      %[acc], %[tmp0], %[acc]\n\t"
+          : [acc]"+v"(acc), [tmp0]"+&v"(tmp0)
+          : [tmp1]"v"(tmp1), [ones]"v"(_mm512_set1_epi16(1))
+      );
+#   else
+      __m512i product0 = _mm512_maddubs_epi16(a0, b0);
+      __m512i product1 = _mm512_maddubs_epi16(a1, b1);
+      product0 = _mm512_adds_epi16(product0, product1);
+      product0 = _mm512_madd_epi16(product0, _mm512_set1_epi16(1));
+      acc = _mm512_add_epi32(acc, product0);
+#   endif
+# endif
+    }
+
+#endif
+
+#if defined (USE_AVX2)
+
+    [[maybe_unused]] static int m256_hadd(__m256i sum, int bias) {
+      __m128i sum128 = _mm_add_epi32(_mm256_castsi256_si128(sum), _mm256_extracti128_si256(sum, 1));
+      sum128 = _mm_add_epi32(sum128, _mm_shuffle_epi32(sum128, _MM_PERM_BADC));
+      sum128 = _mm_add_epi32(sum128, _mm_shuffle_epi32(sum128, _MM_PERM_CDAB));
+      return _mm_cvtsi128_si32(sum128) + bias;
+    }
+
+    [[maybe_unused]] static __m128i m256_haddx4(
+        __m256i sum0, __m256i sum1, __m256i sum2, __m256i sum3,
+        __m128i bias) {
+
+      sum0 = _mm256_hadd_epi32(sum0, sum1);
+      sum2 = _mm256_hadd_epi32(sum2, sum3);
+
+      sum0 = _mm256_hadd_epi32(sum0, sum2);
+
+      __m128i sum128lo = _mm256_castsi256_si128(sum0);
+      __m128i sum128hi = _mm256_extracti128_si256(sum0, 1);
+
+      return _mm_add_epi32(_mm_add_epi32(sum128lo, sum128hi), bias);
+    }
+
+    [[maybe_unused]] static void m256_add_dpbusd_epi32(
+        __m256i& acc,
+        __m256i a,
+        __m256i b) {
+
+# if defined (USE_VNNI)
+#   if defined (USE_INLINE_ASM)
+      asm(
+        VNNI_PREFIX "vpdpbusd %[b], %[a], %[acc]\n\t"
+        : [acc]"+v"(acc)
+        : [a]"v"(a), [b]"vm"(b)
+      );
+#   else
+      acc = _mm256_dpbusd_epi32(acc, a, b);
+#   endif
+# else
+#   if defined (USE_INLINE_ASM)
+      __m256i tmp = _mm256_maddubs_epi16(a, b);
+      asm(
+          "vpmaddwd    %[tmp], %[ones], %[tmp]\n\t"
+          "vpaddd      %[acc], %[tmp], %[acc]\n\t"
+          : [acc]"+v"(acc), [tmp]"+&v"(tmp)
+          : [ones]"v"(_mm256_set1_epi16(1))
+      );
+#   else
+      __m256i product0 = _mm256_maddubs_epi16(a, b);
+      product0 = _mm256_madd_epi16(product0, _mm256_set1_epi16(1));
+      acc = _mm256_add_epi32(acc, product0);
+#   endif
+# endif
+    }
+
+    [[maybe_unused]] static void m256_add_dpbusd_epi32x2(
+        __m256i& acc,
+        __m256i a0, __m256i b0,
+        __m256i a1, __m256i b1) {
+
+# if defined (USE_VNNI)
+#   if defined (USE_INLINE_ASM)
+      asm(
+        VNNI_PREFIX "vpdpbusd %[b0], %[a0], %[acc]\n\t"
+        VNNI_PREFIX "vpdpbusd %[b1], %[a1], %[acc]\n\t"
+        : [acc]"+v"(acc)
+        : [a0]"v"(a0), [b0]"vm"(b0), [a1]"v"(a1), [b1]"vm"(b1)
+      );
+#   else
+      acc = _mm256_dpbusd_epi32(acc, a0, b0);
+      acc = _mm256_dpbusd_epi32(acc, a1, b1);
+#   endif
+# else
+#   if defined (USE_INLINE_ASM)
+      __m256i tmp0 = _mm256_maddubs_epi16(a0, b0);
+      __m256i tmp1 = _mm256_maddubs_epi16(a1, b1);
+      asm(
+          "vpaddsw     %[tmp0], %[tmp1], %[tmp0]\n\t"
+          "vpmaddwd    %[tmp0], %[ones], %[tmp0]\n\t"
+          "vpaddd      %[acc], %[tmp0], %[acc]\n\t"
+          : [acc]"+v"(acc), [tmp0]"+&v"(tmp0)
+          : [tmp1]"v"(tmp1), [ones]"v"(_mm256_set1_epi16(1))
+      );
+#   else
+      __m256i product0 = _mm256_maddubs_epi16(a0, b0);
+      __m256i product1 = _mm256_maddubs_epi16(a1, b1);
+      product0 = _mm256_adds_epi16(product0, product1);
+      product0 = _mm256_madd_epi16(product0, _mm256_set1_epi16(1));
+      acc = _mm256_add_epi32(acc, product0);
+#   endif
+# endif
+    }
+
+#endif
+
+#if defined (USE_SSSE3)
+
+    [[maybe_unused]] static int m128_hadd(__m128i sum, int bias) {
+      sum = _mm_add_epi32(sum, _mm_shuffle_epi32(sum, 0x4E)); //_MM_PERM_BADC
+      sum = _mm_add_epi32(sum, _mm_shuffle_epi32(sum, 0xB1)); //_MM_PERM_CDAB
+      return _mm_cvtsi128_si32(sum) + bias;
+    }
+
+    [[maybe_unused]] static __m128i m128_haddx4(
+        __m128i sum0, __m128i sum1, __m128i sum2, __m128i sum3,
+        __m128i bias) {
+
+      sum0 = _mm_hadd_epi32(sum0, sum1);
+      sum2 = _mm_hadd_epi32(sum2, sum3);
+      sum0 = _mm_hadd_epi32(sum0, sum2);
+      return _mm_add_epi32(sum0, bias);
+    }
+
+    [[maybe_unused]] static void m128_add_dpbusd_epi32(
+        __m128i& acc,
+        __m128i a,
+        __m128i b) {
+
+#   if defined (USE_INLINE_ASM)
+      __m128i tmp = _mm_maddubs_epi16(a, b);
+      asm(
+          "pmaddwd    %[ones], %[tmp]\n\t"
+          "paddd      %[tmp], %[acc]\n\t"
+          : [acc]"+v"(acc), [tmp]"+&v"(tmp)
+          : [ones]"v"(_mm_set1_epi16(1))
+      );
+#   else
+      __m128i product0 = _mm_maddubs_epi16(a, b);
+      product0 = _mm_madd_epi16(product0, _mm_set1_epi16(1));
+      acc = _mm_add_epi32(acc, product0);
+#   endif
+    }
+
+    [[maybe_unused]] static void m128_add_dpbusd_epi32x2(
+        __m128i& acc,
+        __m128i a0, __m128i b0,
+        __m128i a1, __m128i b1) {
+
+#   if defined (USE_INLINE_ASM)
+      __m128i tmp0 = _mm_maddubs_epi16(a0, b0);
+      __m128i tmp1 = _mm_maddubs_epi16(a1, b1);
+      asm(
+          "paddsw     %[tmp1], %[tmp0]\n\t"
+          "pmaddwd    %[ones], %[tmp0]\n\t"
+          "paddd      %[tmp0], %[acc]\n\t"
+          : [acc]"+v"(acc), [tmp0]"+&v"(tmp0)
+          : [tmp1]"v"(tmp1), [ones]"v"(_mm_set1_epi16(1))
+      );
+#   else
+      __m128i product0 = _mm_maddubs_epi16(a0, b0);
+      __m128i product1 = _mm_maddubs_epi16(a1, b1);
+      product0 = _mm_adds_epi16(product0, product1);
+      product0 = _mm_madd_epi16(product0, _mm_set1_epi16(1));
+      acc = _mm_add_epi32(acc, product0);
+#   endif
+    }
+
+#endif
+
+#if defined (USE_NEON)
+
+    [[maybe_unused]] static int neon_m128_reduce_add_epi32(int32x4_t s) {
+#   if USE_NEON >= 8
+      return vaddvq_s32(s);
+#   else
+      return s[0] + s[1] + s[2] + s[3];
+#   endif
+    }
+
+    [[maybe_unused]] static int neon_m128_hadd(int32x4_t sum, int bias) {
+      return neon_m128_reduce_add_epi32(sum) + bias;
+    }
+
+    [[maybe_unused]] static int32x4_t neon_m128_haddx4(
+        int32x4_t sum0, int32x4_t sum1, int32x4_t sum2, int32x4_t sum3,
+        int32x4_t bias) {
+
+      int32x4_t hsums {
+        neon_m128_reduce_add_epi32(sum0),
+        neon_m128_reduce_add_epi32(sum1),
+        neon_m128_reduce_add_epi32(sum2),
+        neon_m128_reduce_add_epi32(sum3)
+      };
+      return vaddq_s32(hsums, bias);
+    }
+
+    [[maybe_unused]] static void neon_m128_add_dpbusd_epi32x2(
+        int32x4_t& acc,
+        int8x8_t a0, int8x8_t b0,
+        int8x8_t a1, int8x8_t b1) {
+
+      int16x8_t product = vmull_s8(a0, b0);
+      product = vmlal_s8(product, a1, b1);
+      acc = vpadalq_s16(acc, product);
+    }
+
+#endif
+
+}
+
+#endif // STOCKFISH_SIMD_H_INCLUDED
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -769,7 +769,7 @@ Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* resu
        goto encode_remaining; // With pawns we have finished special treatments
    }

-    // In positions withouth pawns, we further flip the squares to ensure leading
+    // In positions without pawns, we further flip the squares to ensure leading
    // piece is below RANK_5.
    if (rank_of(squares[0]) > RANK_4)
        for (int i = 0; i < size; ++i)
@@ -812,7 +812,7 @@ Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* resu
    // Rs "together" in 62 * 61 / 2 ways (we divide by 2 because rooks can be
    // swapped and still get the same position.)
    //
-    // In case we have at least 3 unique pieces (inlcuded kings) we encode them
+    // In case we have at least 3 unique pieces (included kings) we encode them
    // together.
    if (entry->hasUniquePieces) {

@@ -827,7 +827,7 @@ Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* resu
                   + (squares[1] - adjust1)) * 62
                   +  squares[2] - adjust2;

-        // First piece is on a1-h8 diagonal, second below: map this occurence to
+        // First piece is on a1-h8 diagonal, second below: map this occurrence to
        // 6 to differentiate from the above case, rank_of() maps a1-d4 diagonal
        // to 0...3 and finally MapB1H1H7[] maps the b1-h1-h7 triangle to 0..27.
        else if (off_A1H8(squares[1]))
@@ -857,7 +857,7 @@ encode_remaining:
    idx *= d->groupIdx[0];
    Square* groupSq = squares + d->groupLen[0];

-    // Encode remainig pawns then pieces according to square, in ascending order
+    // Encode remaining pawns then pieces according to square, in ascending order
    bool remainingPawns = entry->hasPawns && entry->pawnCount[1];

    while (d->groupLen[++next])
@@ -885,7 +885,7 @@ encode_remaining:

 // Group together pieces that will be encoded together. The general rule is that
 // a group contains pieces of same type and color. The exception is the leading
-// group that, in case of positions withouth pawns, can be formed by 3 different
+// group that, in case of positions without pawns, can be formed by 3 different
 // pieces (default) or by the king pair when there is not a unique piece apart
 // from the kings. When there are pawns, pawns are always first in pieces[].
 //
@@ -917,7 +917,7 @@ void set_groups(T& e, PairsData* d, int order[], File f) {
    //
    // This ensures unique encoding for the whole position. The order of the
    // groups is a per-table parameter and could not follow the canonical leading
-    // pawns/pieces -> remainig pawns -> remaining pieces. In particular the
+    // pawns/pieces -> remaining pawns -> remaining pieces. In particular the
    // first group is at order[0] position and the remaining pawns, when present,
    // are at order[1] position.
    bool pp = e.hasPawns && e.pawnCount[1]; // Pawns on both sides
@@ -937,7 +937,7 @@ void set_groups(T& e, PairsData* d, int order[], File f) {
            d->groupIdx[1] = idx;
            idx *= Binomial[d->groupLen[1]][48 - d->groupLen[0]];
        }
-        else // Remainig pieces
+        else // Remaining pieces
        {
            d->groupIdx[next] = idx;
            idx *= Binomial[d->groupLen[next]][freeSquares];
@@ -947,7 +947,7 @@ void set_groups(T& e, PairsData* d, int order[], File f) {
    d->groupIdx[n] = idx;
 }

-// In Recursive Pairing each symbol represents a pair of childern symbols. So
+// In Recursive Pairing each symbol represents a pair of children symbols. So
 // read d->btree[] symbols data and expand each one in his left and right child
 // symbol until reaching the leafs that represent the symbol value.
 uint8_t set_symlen(PairsData* d, Sym s, std::vector<bool>& visited) {
@@ -1290,7 +1290,7 @@ void Tablebases::init(const std::string& paths) {
    for (auto s : diagonal)
        MapA1D1D4[s] = code++;

-    // MapKK[] encodes all the 461 possible legal positions of two kings where
+    // MapKK[] encodes all the 462 possible legal positions of two kings where
    // the first is in the a1-d1-d4 triangle. If the first king is on the a1-d4
    // diagonal, the other one shall not to be above the a1-h8 diagonal.
    std::vector<std::pair<int, Square>> bothOnDiagonal;
@@ -1317,7 +1317,7 @@ void Tablebases::init(const std::string& paths) {
    for (auto p : bothOnDiagonal)
        MapKK[p.first][p.second] = code++;

-    // Binomial[] stores the Binomial Coefficents using Pascal rule. There
+    // Binomial[] stores the Binomial Coefficients using Pascal rule. There
    // are Binomial[k][n] ways to choose k elements from a set of n elements.
    Binomial[0][0] = 1;

@@ -1337,7 +1337,7 @@ void Tablebases::init(const std::string& paths) {
    for (int leadPawnsCnt = 1; leadPawnsCnt <= 5; ++leadPawnsCnt)
        for (File f = FILE_A; f <= FILE_D; ++f)
        {
-            // Restart the index at every file because TB table is splitted
+            // Restart the index at every file because TB table is split
            // by file, so we can reuse the same index for different files.
            int idx = 0;

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -38,7 +38,7 @@ enum WDLScore {
 // Possible states after a probing operation
 enum ProbeState {
    FAIL              =  0, // Probe failed (missing file table)
-    OK                =  1, // Probe succesful
+    OK                =  1, // Probe successful
    CHANGE_STM        = -1, // DTZ should check the other side
    ZEROING_BEST_MOVE =  2  // Best move zeroes DTZ (capture or pawn move)
 };
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -60,15 +60,15 @@ void Thread::clear() {

  counterMoves.fill(MOVE_NONE);
  mainHistory.fill(0);
-  lowPlyHistory.fill(0);
  captureHistory.fill(0);
-
+  previousDepth = 0;
+  
  for (bool inCheck : { false, true })
      for (StatsType c : { NoCaptures, Captures })
      {
          for (auto& to : continuationHistory[inCheck][c])
                for (auto& h : to)
-                      h->fill(0);
+                      h->fill(-71);
          continuationHistory[inCheck][c][NO_PIECE][0]->fill(Search::CounterMovePruneThreshold - 1);
      }
 }
@@ -187,6 +187,7 @@ void ThreadPool::clear() {

  main()->callsCnt = 0;
  main()->bestPreviousScore = VALUE_INFINITE;
+  main()->bestPreviousAverageScore = VALUE_INFINITE;
  main()->previousTimeReduction = 1.0;
 }

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -88,19 +88,20 @@ public:
  Pawns::Table pawnsTable;
  Material::Table materialTable;
  size_t pvIdx, pvLast;
-  uint64_t ttHitAverage;
+  RunningAverage complexityAverage;
+  std::atomic<uint64_t> nodes, tbHits, bestMoveChanges;
  int selDepth, nmpMinPly;
  Color nmpColor;
-  std::atomic<uint64_t> nodes, tbHits, bestMoveChanges;
+  Value bestValue, optimism[COLOR_NB];
  uint64_t maxNodes;

  Position rootPos;
  StateInfo rootState;
  Search::RootMoves rootMoves;
-  Depth rootDepth, completedDepth;
+  Depth rootDepth, completedDepth, depth, previousDepth;
+  Value rootDelta;
  CounterMoveHistory counterMoves;
  ButterflyHistory mainHistory;
-  LowPlyHistory lowPlyHistory;
  CapturePieceToHistory captureHistory;
  ContinuationHistory continuationHistory[2][2];
  Score trend;
@@ -123,6 +124,7 @@ struct MainThread : public Thread {

  double previousTimeReduction;
  Value bestPreviousScore;
+  Value bestPreviousAverageScore;
  Value iterValue[4];
  int callsCnt;
  bool stopOnPonderhit;
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -68,6 +68,9 @@ void TimeManagement::init(Search::LimitsType& limits, Color us, int ply) {
  TimePoint timeLeft =  std::max(TimePoint(1),
      limits.time[us] + limits.inc[us] * (mtg - 1) - moveOverhead * (2 + mtg));

+  // Use extra time with larger increments
+  double optExtra = std::clamp(1.0 + 12.0 * limits.inc[us] / limits.time[us], 1.0, 1.12);
+
  // A user may scale time usage by setting UCI option "Slow Mover"
  // Default is 100 and changing this value will probably lose elo.
  timeLeft = slowMover * timeLeft / 100;
@@ -78,15 +81,16 @@ void TimeManagement::init(Search::LimitsType& limits, Color us, int ply) {
  if (limits.movestogo == 0)
  {
      optScale = std::min(0.0084 + std::pow(ply + 3.0, 0.5) * 0.0042,
-                           0.2 * limits.time[us] / double(timeLeft));
+                           0.2 * limits.time[us] / double(timeLeft))
+                 * optExtra;
      maxScale = std::min(7.0, 4.0 + ply / 12.0);
  }

  // x moves in y seconds (+ z increment)
  else
  {
-      optScale = std::min((0.8 + ply / 128.0) / mtg,
-                            0.8 * limits.time[us] / double(timeLeft));
+      optScale = std::min((0.88 + ply / 116.4) / mtg,
+                            0.88 * limits.time[us] / double(timeLeft));
      maxScale = std::min(6.3, 1.5 + 0.11 * mtg);
  }

@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -45,9 +45,9 @@ void TTEntry::save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev)
      move16 = (uint16_t)m;

  // Overwrite less valuable entries (cheapest checks first)
-  if (b == BOUND_EXACT
+  if (   b == BOUND_EXACT
      || (uint16_t)k != key16
-      || d - DEPTH_OFFSET > depth8 - 4)
+      || d - DEPTH_OFFSET + 2 * pv > depth8 - 4)
  {
      assert(d > DEPTH_OFFSET);
      assert(d < 256 + DEPTH_OFFSET);
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -84,7 +84,7 @@ class Tune {

  static Tune& instance() { static Tune t; return t; } // Singleton

-  // Use polymorphism to accomodate Entry of different types in the same vector
+  // Use polymorphism to accommodate Entry of different types in the same vector
  struct EntryBase {
    virtual ~EntryBase() = default;
    virtual void init_option() = 0;
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -457,7 +457,7 @@ constexpr Square rotate180(Square sq) {
 }

 constexpr int from_to(Move m) {
- return m & 0xFFF;
+  return m & 0xFFF;
 }

 constexpr MoveType type_of(Move m) {
@@ -472,10 +472,6 @@ constexpr Move make_move(Square from, Square to) {
  return Move((from << 6) + to);
 }

-constexpr Move reverse_move(Move m) {
-  return make_move(to_sq(m), from_sq(m));
-}
-
 template<MoveType T>
 constexpr Move make(Square from, Square to, PieceType pt = KNIGHT) {
  return Move(T + ((pt - KNIGHT) << 12) + (from << 6) + to);
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -220,8 +220,8 @@ namespace UCI {
     // Coefficients of a 3rd order polynomial fit based on fishtest data
     // for two parameters needed to transform eval to the argument of a
     // logistic function.
-     double as[] = {-3.68389304,  30.07065921, -60.52878723, 149.53378557};
-     double bs[] = {-2.0181857,   15.85685038, -29.83452023,  47.59078827};
+     double as[] = {-1.17202460e-01, 5.94729104e-01, 1.12065546e+01, 1.22606222e+02};
+     double bs[] = {-1.79066759,  11.30759193, -17.43677612,  36.47147479};
     double a = (((as[0] * m + as[1]) * m + as[2]) * m) + as[3];
     double b = (((bs[0] * m + bs[1]) * m + bs[2]) * m) + bs[3];

@@ -380,8 +380,14 @@ void UCI::loop(int argc, char* argv[]) {
          std::cout << th.id() << '\n';
        });
      }
+      else if (token == "--help" || token == "help" || token == "--license" || token == "license")
+          sync_cout << "\nStockfish is a powerful chess engine and free software licensed under the GNU GPLv3."
+                       "\nStockfish is normally used with a separate graphical user interface (GUI)."
+                       "\nStockfish implements the universal chess interface (UCI) to exchange information."
+                       "\nFor further information see https://github.com/official-stockfish/Stockfish#readme"
+                       "\nor the corresponding README.md and Copying.txt files distributed with this program.\n" << sync_endl;
      else if (!token.empty() && token[0] != '#')
-          sync_cout << "Unknown command: " << cmd << sync_endl;
+          sync_cout << "Unknown command: '" << cmd << "'. Type help for more information." << sync_endl;

  } while (token != "quit" && argc == 1); // Command line args are one-shot
 }
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /*
  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
-  Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+  Copyright (C) 2004-2022 The Stockfish developers (see AUTHORS file)

  Stockfish is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -185,7 +185,7 @@ Option& Option::operator=(const string& v) {

  assert(!type.empty());

-  if (   (type != "button" && v.empty())
+  if (   (type != "button" && type != "string" && v.empty())
      || (type == "check" && v != "true" && v != "false")
      || (type == "spin" && (stof(v) < min || stof(v) > max)))
      return *this;
@@ -43,7 +43,7 @@ cat << EOF > repeat.exp
 expect eof
 EOF

-# to increase the likelyhood of finding a non-reproducible case,
+# to increase the likelihood of finding a non-reproducible case,
 # the allowed number of nodes are varied systematically
 for i in `seq 1 20`
 do