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Remove rook passers eval completely

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Tested in no-regression mode.

Passed STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 17727 W: 3248 L: 3122 D: 11357

And (a very long!) LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 106327 W: 16258 L: 16265 D: 73804

bench: 7396783
This commit is contained in:
Arjun Temurnikar 2014-04-20 16:44:18 -07:00 • committed by Marco Costalba
parent de6fe2cb4e
commit fe23f27086
1 changed files with 0 additions and 15 deletions
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15
src/evaluate.cpp
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@ -638,21 +638,6 @@ namespace {
}
} // rr != 0
// Rook pawns are a special case: They are sometimes worse, and
// sometimes better than other passed pawns. It is difficult to find
// good rules for determining whether they are good or bad. For now,
// we try the following: Increase the value for rook pawns if the
// other side has no pieces apart from a knight, and decrease the
// value if the other side has a rook or queen.
if (file_of(s) == FILE_A || file_of(s) == FILE_H)
{
if (pos.non_pawn_material(Them) <= KnightValueMg)
ebonus += ebonus / 4;
else if (pos.pieces(Them, ROOK, QUEEN))
ebonus -= ebonus / 4;
}
if (pos.count<PAWN>(Us) < pos.count<PAWN>(Them))
ebonus += ebonus / 4;