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Remove supporting pawns

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Tested in no-regression mode

Passed both STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 44957 W: 7984 L: 7903 D: 29070

and LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 12396 W: 1916 L: 1783 D: 8697

Bench: 7907885
This commit is contained in:
Joseph Hellis
2014-04-17 08:43:40 +02:00
committed by Marco Costalba
parent 9073866491
commit 619d66b7ab
1 changed files with 1 additions and 10 deletions
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11
src/evaluate.cpp
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@@ -583,7 +583,7 @@ namespace {
const Color Them = (Us == WHITE ? BLACK : WHITE); const Color Them = (Us == WHITE ? BLACK : WHITE);
Bitboard b, squaresToQueen, defendedSquares, unsafeSquares, supportingPawns; Bitboard b, squaresToQueen, defendedSquares, unsafeSquares;
Score score = SCORE_ZERO; Score score = SCORE_ZERO;
b = ei.pi->passed_pawns(Us); b = ei.pi->passed_pawns(Us);
@@ -651,15 +651,6 @@ namespace {
} }
} // rr != 0 } // rr != 0
// Increase the bonus if the passed pawn is supported by a friendly pawn
// on the same rank and a bit smaller if it's on the previous rank.
supportingPawns = pos.pieces(Us, PAWN) & adjacent_files_bb(file_of(s));
if (supportingPawns & rank_bb(s))
ebonus += Value(r * 20);
else if (supportingPawns & rank_bb(s - pawn_push(Us)))
ebonus += Value(r * 12);
// Rook pawns are a special case: They are sometimes worse, and // Rook pawns are a special case: They are sometimes worse, and
// sometimes better than other passed pawns. It is difficult to find // sometimes better than other passed pawns. It is difficult to find
// good rules for determining whether they are good or bad. For now, // good rules for determining whether they are good or bad. For now,