kate/BadFish
1
0
Fork 0
mirror of https://github.com/sockspls/badfish synced 2025-05-02 17:49:35 +00:00
Code Issues Releases Wiki Activity

Update bestValue when futility pruning

Browse source 
In qsearch we should update the bestValue as we do
in case of futilityValue < beta, also when pruning
moves with non-positive see.

Spotted by Lucas Braesch

Bench: 5695710
This commit is contained in:
Marco Costalba 2012-11-26 16:13:36 +01:00
parent 55df3fa2d7
commit 5af8179647
1 changed files with 4 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
src/search.cpp
View file

@ -1217,9 +1217,7 @@ split_point_start: // At split points actual search starts from here
if (futilityValue < beta) if (futilityValue < beta)
{ {
if (futilityValue > bestValue) bestValue = std::max(bestValue, futilityValue);
bestValue = futilityValue;
continue; continue;
} }
@ -1227,8 +1225,11 @@ split_point_start: // At split points actual search starts from here
if ( futilityBase < beta if ( futilityBase < beta
&& depth < DEPTH_ZERO && depth < DEPTH_ZERO
&& pos.see(move) <= 0) && pos.see(move) <= 0)
{
bestValue = std::max(bestValue, futilityBase);
continue; continue;
} }
}
// Detect non-capture evasions that are candidate to be pruned // Detect non-capture evasions that are candidate to be pruned
evasionPrunable = !PvNode evasionPrunable = !PvNode