HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-22 10:06:26 +08:00
Code Issues Packages Projects Releases Wiki Activity

Remove advanced_pawn_push()

Browse Source 
Continuation of work by @topologist: we now do futility pruning and movecount
pruning in qsearch() for pawn pushes up to the 7th rank. So the condition to
avoid the pruning is if the move is a promotion or not. This allows to get rid
of the advanced_pawn_push() function in position.h alltogether.

Passed STC
https://tests.stockfishchess.org/tests/view/6048c5842433018de7a387e6
LLR: 2.93 (-2.94,2.94) {-1.25,0.25}
Total: 34424 W: 3081 L: 3015 D: 28328
Ptnml(0-2): 110, 2442, 12052, 2488, 120

Passed LTC
https://tests.stockfishchess.org/tests/view/6048f7d22433018de7a387f0
LLR: 2.94 (-2.94,2.94) {-0.75,0.25}
Total: 142024 W: 5170 L: 5202 D: 131652
Ptnml(0-2): 50, 4678, 61613, 4596, 75

Closes https://github.com/official-stockfish/Stockfish/pull/3390

Bench: 4339126
This commit is contained in:
Vizvezdenec
2021-03-11 14:51:20 +03:00
committed by Stéphane Nicolet
parent 830f597134
commit d58e83695f
2 changed files with 1 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/search.cpp
View File

@@ -1579,7 +1579,7 @@ moves_loop: // When in check, search starts from here
if ( bestValue > VALUE_TB_LOSS_IN_MAX_PLY
&& !givesCheck
&& futilityBase > -VALUE_KNOWN_WIN
&& !pos.advanced_pawn_push(move))
&& type_of(move) != PROMOTION)
{
if (moveCount > 2)