kate/BadFish
1
0
Fork 0
mirror of https://github.com/sockspls/badfish synced 2025-04-30 16:53:09 +00:00
Code Issues Releases Wiki Activity

Razor at depth one, but do razoring only when not in check

Browse source 
This way razoring is always based on exact evaluation and
follows simple formula.

Joona's test results are positive:

32-bit 1CPU:

Mod - Orig: 1073 - 993

64-bit 4CPU:

Mod - Orig: 759 - 721

Functionality Signature: 11448962

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski 2010-01-14 22:58:38 +02:00 • committed by Marco Costalba
parent 942c18ef66
commit d457594197
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
src/search.cpp
View file

@ -1447,8 +1447,9 @@ namespace {
} }
// Null move search not allowed, try razoring // Null move search not allowed, try razoring
else if ( !value_is_mate(beta) else if ( !value_is_mate(beta)
&& !isCheck
&& depth < RazorDepth && depth < RazorDepth
&& staticValue < beta - (depth > OnePly ? NullMoveMargin + 16 * depth : 2*NullMoveMargin) && staticValue < beta - (NullMoveMargin + 16 * depth)
&& ss[ply - 1].currentMove != MOVE_NULL && ss[ply - 1].currentMove != MOVE_NULL
&& ttMove == MOVE_NONE && ttMove == MOVE_NONE
&& !pos.has_pawn_on_7th(pos.side_to_move())) && !pos.has_pawn_on_7th(pos.side_to_move()))