HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-06 10:53:50 +08:00
Code Issues Packages Projects Releases Wiki Activity

Simplify away hint for common parent position at probcut

Browse Source 
Since it's introduction at probcut step the nnue network has changed
substantially and now it no longer seems useful.

Passed non-regression test at STC
https://tests.stockfishchess.org/tests/view/675fe27986d5ee47d9542d86
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 118656 W: 30732 L: 30609 D: 57315
Ptnml(0-2): 319, 12767, 33049, 12858, 335

N.B.: It may be useful to reintroduce it here at probcut if we know that
a node that was cut away previously now has to be explored. Exploring
new ground will deliver no tt-hits so in this case the hint for common
parent position might be useful.

No functional change
This commit is contained in:
pb00067
2025-01-07 10:06:03 +01:00
committed by Disservin
parent 403a5e100b
commit c88a5b3950
1 changed files with 0 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/search.cpp
View File

@@ -911,8 +911,6 @@ Value Search::Worker::search(
return is_decisive(value) ? value : value - (probCutBeta - beta);
}
}
Eval::NNUE::hint_common_parent_position(pos, networks[numaAccessToken], refreshTable);
}
moves_loop: // When in check, search starts here