opelly/Stockfish
1
0
Fork 0
mirror of https://github.com/opelly27/Stockfish.git synced 2026-05-20 02:47:45 +00:00
Code Issues Packages Projects Releases Wiki Activity

Better nonpawn indexing

Browse Source 
Improves indexing scheme, by noting that both sides are likely to access the same non_pawn_index nearby.

LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 75936 W: 19905 L: 19554 D: 36477
Ptnml(0-2): 190, 7863, 21554, 8128, 233
https://tests.stockfishchess.org/tests/view/67904d0cfc8c306ba6cea332

closes https://github.com/official-stockfish/Stockfish/pull/5816

No functional change

Co-authored-by: Andrew Grant <andrew.github@grantnet.us>
This commit is contained in:
Shawn Xu
2025-01-21 17:41:33 -08:00
committed by Joost VandeVondele
parent 435ba3dbb5
commit 889fed448c
2 changed files with 10 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+4 -4
View File
@@ -89,8 +89,8 @@ int correction_value(const Worker& w, const Position& pos, const Stack* ss) {
const auto pcv = w.pawnCorrectionHistory[us][pawn_structure_index<Correction>(pos)];
const auto macv = w.majorPieceCorrectionHistory[us][major_piece_index(pos)];
const auto micv = w.minorPieceCorrectionHistory[us][minor_piece_index(pos)];
const auto wnpcv = w.nonPawnCorrectionHistory[WHITE][us][non_pawn_index<WHITE>(pos)];
const auto bnpcv = w.nonPawnCorrectionHistory[BLACK][us][non_pawn_index<BLACK>(pos)];
const auto wnpcv = w.nonPawnCorrectionHistory[WHITE][non_pawn_index<WHITE>(pos)][us];
const auto bnpcv = w.nonPawnCorrectionHistory[BLACK][non_pawn_index<BLACK>(pos)][us];
const auto cntcv =
m.is_ok() ? (*(ss - 2)->continuationCorrectionHistory)[pos.piece_on(m.to_sq())][m.to_sq()]
: 0;
@@ -1442,9 +1442,9 @@ moves_loop: // When in check, search starts here
<< bonus * 114 / 128;
thisThread->majorPieceCorrectionHistory[us][major_piece_index(pos)] << bonus * 163 / 128;
thisThread->minorPieceCorrectionHistory[us][minor_piece_index(pos)] << bonus * 146 / 128;
thisThread->nonPawnCorrectionHistory[WHITE][us][non_pawn_index<WHITE>(pos)]
thisThread->nonPawnCorrectionHistory[WHITE][non_pawn_index<WHITE>(pos)][us]
<< bonus * nonPawnWeight / 128;
thisThread->nonPawnCorrectionHistory[BLACK][us][non_pawn_index<BLACK>(pos)]
thisThread->nonPawnCorrectionHistory[BLACK][non_pawn_index<BLACK>(pos)][us]
<< bonus * nonPawnWeight / 128;
if (m.is_ok())