HCha/Stockfish
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bench: 7699138
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Marco Costalba
2015-02-08 21:31:25 +01:00
parent 8f10f6c9cd e118570038
commit ce8ac7997c
1 changed files with 12 additions and 0 deletions
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12
src/pawns.cpp
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@@ -61,6 +61,14 @@ namespace {
// Unsupported pawn penalty // Unsupported pawn penalty
const Score UnsupportedPawnPenalty = S(20, 10); const Score UnsupportedPawnPenalty = S(20, 10);
// Center bind bonus: Two pawns controlling the same central square
const Bitboard CenterBindMask[COLOR_NB] = {
(FileDBB | FileEBB) & (Rank5BB | Rank6BB | Rank7BB),
(FileDBB | FileEBB) & (Rank4BB | Rank3BB | Rank2BB)
};
const Score CenterBind = S(16, 0);
// Weakness of our pawn shelter in front of the king by [distance from edge][rank] // Weakness of our pawn shelter in front of the king by [distance from edge][rank]
const Value ShelterWeakness[][RANK_NB] = { const Value ShelterWeakness[][RANK_NB] = {
{ V( 99), V(20), V(26), V(54), V(85), V( 92), V(108) }, { V( 99), V(20), V(26), V(54), V(85), V( 92), V(108) },
@@ -195,6 +203,10 @@ namespace {
b = e->semiopenFiles[Us] ^ 0xFF; b = e->semiopenFiles[Us] ^ 0xFF;
e->pawnSpan[Us] = b ? int(msb(b) - lsb(b)) : 0; e->pawnSpan[Us] = b ? int(msb(b) - lsb(b)) : 0;
// Center binds: Two pawns controlling the same central square
b = shift_bb<Right>(ourPawns) & shift_bb<Left>(ourPawns) & CenterBindMask[Us];
score += popcount<Max15>(b) * CenterBind;
return score; return score;
} }