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stockfish
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Normalize "pawn in front of minor" patch 

No functional change.
sf_4_base
Marco Costalba 2013-08-17 11:05:55 +02:00
parent e005270fb6
commit 27e9fc1067
1 changed files with 3 additions and 2 deletions
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5
src/evaluate.cpp
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@ -173,6 +173,7 @@ namespace {
const Score RookOpenFile = make_score(43, 21);
const Score RookSemiopenFile = make_score(19, 10);
const Score BishopPawns = make_score( 8, 12);
const Score MinorBehindPawn = make_score(16, 0);
const Score UndefendedMinor = make_score(25, 10);
const Score TrappedRook = make_score(90, 0);
@ -536,10 +537,10 @@ Value do_evaluate(const Position& pos, Value& margin) {
if (!(pos.pieces(Them, PAWN) & pawn_attack_span(Us, s)))
score += evaluate_outposts<Piece, Us>(pos, ei, s);
// Pawn in front of knight/bishop
// Bishop or knight behind a pawn
if ( relative_rank(Us, s) < RANK_5
&& (pos.pieces(PAWN) & (s + pawn_push(Us))))
score += make_score(16, 0);
score += MinorBehindPawn;
}
if ( (Piece == ROOK || Piece == QUEEN)