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removed second killer move

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STC with movepicker rewrite:

LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 46656 W: 12208 L: 11995 D: 22453
Ptnml(0-2): 203, 5461, 11777, 5694, 193
https://tests.stockfishchess.org/tests/view/668d98a15034141ae5999e68

Earlier version passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 468896 W: 120999 L: 120054 D: 227843
Ptnml(0-2): 1207, 55209, 120639, 56218, 1175
https://tests.stockfishchess.org/tests/view/668b17d2cf91c430fca58630

Earlier version passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 550524 W: 139553 L: 139877 D: 271094
Ptnml(0-2): 333, 61646, 151616, 61346, 321
https://tests.stockfishchess.org/tests/view/668b2e04cf91c430fca586b1

closes https://github.com/official-stockfish/Stockfish/pull/5472

bench 1234309

Co-authored-by: rn5f107s2 <clemens.lerchl@gmail.com>
This commit is contained in:
yl25946
2024-07-10 23:49:16 -05:00
committed by Joost VandeVondele
parent 6135a0e2f8
commit 8d1e41458e
4 changed files with 25 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/movepick.cpp
+12 -16
View File
@@ -20,7 +20,6 @@
#include <algorithm>
#include <cassert>
#include <iterator>
#include <utility>
#include "bitboard.h"
@@ -35,7 +34,7 @@ enum Stages {
MAIN_TT,
CAPTURE_INIT,
GOOD_CAPTURE,
REFUTATION,
KILLER,
QUIET_INIT,
GOOD_QUIET,
BAD_CAPTURE,
@@ -91,14 +90,14 @@ MovePicker::MovePicker(const Position& p,
const CapturePieceToHistory* cph,
const PieceToHistory** ch,
const PawnHistory* ph,
const Move* killers) :
Move km) :
pos(p),
mainHistory(mh),
captureHistory(cph),
continuationHistory(ch),
pawnHistory(ph),
ttMove(ttm),
refutations{{killers[0], 0}, {killers[1], 0}},
killer{km, 0},
depth(d) {
assert(d > 0);
@@ -268,19 +267,17 @@ top:
}))
return *(cur - 1);
// Prepare the pointers to loop over the refutations array
cur = std::begin(refutations);
endMoves = std::end(refutations);
++stage;
[[fallthrough]];
case REFUTATION :
if (select<Next>([&]() {
return *cur != Move::none() && !pos.capture_stage(*cur) && pos.pseudo_legal(*cur);
}))
return *(cur - 1);
case KILLER :
// increment it before so if we aren't stuck here indefinitely
++stage;
if (killer != ttMove && killer != Move::none() && !pos.capture_stage(killer)
&& pos.pseudo_legal(killer))
return killer;
[[fallthrough]];
case QUIET_INIT :
@@ -297,8 +294,7 @@ top:
[[fallthrough]];
case GOOD_QUIET :
if (!skipQuiets
&& select<Next>([&]() { return *cur != refutations[0] && *cur != refutations[1]; }))
if (!skipQuiets && select<Next>([&]() { return *cur != killer; }))
{
if ((cur - 1)->value > -7998 || (cur - 1)->value <= quiet_threshold(depth))
return *(cur - 1);
@@ -327,7 +323,7 @@ top:
case BAD_QUIET :
if (!skipQuiets)
return select<Next>([&]() { return *cur != refutations[0] && *cur != refutations[1]; });
return select<Next>([&]() { return *cur != killer; });
return Move::none();