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Remove SEE optimizations

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Don't seem to help, perhaps because we
return an approximate SEE score instead of the
real negative score so that we have some bad capture
or evasion sub-optimal ordering that compensates
the speed up.

Anyhow after 999 games at 1+0
Mod vs Orig +240 =514 -245 -2 ELO

So almost no harm to remove and make the code simpler.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-11-01 22:09:53 +01:00
parent 70b7404a63
commit 12461996a5
3 changed files with 7 additions and 33 deletions
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4
src/evaluate.cpp
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@@ -1171,8 +1171,8 @@ namespace {
Square b8 = relative_square(us, (square_file(s) == FILE_A) ? SQ_B8 : SQ_G8);
if ( pos.piece_on(b6) == piece_of_color_and_type(opposite_color(us), PAWN)
&& pos.see(s, b6, false) < 0
&& pos.see(s, b8, false) < 0)
&& pos.see(s, b6) < 0
&& pos.see(s, b8) < 0)
{
ei.mgValue -= Sign[us] * TrappedBishopA7H7Penalty;
ei.egValue -= Sign[us] * TrappedBishopA7H7Penalty;