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Evaluate mobility of pinned pieces exactly
Previously some squares could be "incorrectly" awarded to a pinned piece. e.g. in 3k4/1q6/3b4/3Q4/8/5K2/B7/8 b - - 0 1 the black bishop get 4 squares too many and the white queen gets 6. Passed both short TC. LLR: 2.97 (-2.94,2.94) [-1.50,4.50] Total: 4871 W: 934 L: 817 D: 3120 And long TC: LLR: 2.96 (-2.94,2.94) [0.00,6.00] Total: 38968 W: 6113 L: 5837 D: 27018 bench: 9282549
This commit is contained in:
committed by
Marco Costalba
parent
3ed86ed3f9
commit
091aff0445
@@ -492,7 +492,7 @@ Value do_evaluate(const Position& pos) {
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: pos.attacks_from<Piece>(s);
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if (ei.pinnedPieces[Us] & s)
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b &= PseudoAttacks[QUEEN][pos.king_square(Us)];
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b &= LineBB[pos.king_square(Us)][s];
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ei.attackedBy[Us][Piece] |= b;
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