Bonus for loose enemies
STC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 30504 W: 5743 L: 5485 D: 19276 LTC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 11936 W: 1651 L: 1493 D: 8792 Bench: 8880041 Resolves #606pull/606/merge
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8788612828
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24dac5ccd3
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@ -185,6 +185,7 @@ namespace {
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const Score TrappedRook = S(92, 0);
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const Score Checked = S(20, 20);
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const Score ThreatByHangingPawn = S(70, 63);
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const Score LooseEnemies = S( 0, 25);
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const Score Hanging = S(48, 28);
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const Score ThreatByPawnPush = S(31, 19);
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const Score Unstoppable = S( 0, 20);
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@ -469,6 +470,11 @@ namespace {
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Bitboard b, weak, defended, safeThreats;
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Score score = SCORE_ZERO;
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// Small bonus if the opponent has loose pawns or pieces
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if ( (pos.pieces(Them) ^ pos.pieces(Them, QUEEN, KING))
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& ~(ei.attackedBy[Us][ALL_PIECES] | ei.attackedBy[Them][ALL_PIECES]))
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score += LooseEnemies;
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// Non-pawn enemies attacked by a pawn
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weak = (pos.pieces(Them) ^ pos.pieces(Them, PAWN)) & ei.attackedBy[Us][PAWN];
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