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PSV3_1
Small speed-up in pawn.cpp Results for 10 tests for each version: Base Test Diff Mean 1435636 1445238 -9602 StDev 22576 23189 1848 p-value: 1 speedup: 0.007 No functional change Resolves #295
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1 changed files with 11 additions and 13 deletions
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@ -45,10 +45,10 @@ namespace {
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// Backward pawn penalty by opposed flag and file
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const Score Backward[2][FILE_NB] = {
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{ S(30, 42), S(43, 46), S(49, 46), S(49, 46),
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S(49, 46), S(49, 46), S(43, 46), S(30, 42) },
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{ S(20, 28), S(29, 31), S(33, 31), S(33, 31),
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S(33, 31), S(33, 31), S(29, 31), S(20, 28) } };
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{ S(50, 52), S(63, 56), S(69, 56), S(69, 56),
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S(69, 56), S(69, 56), S(63, 56), S(50, 52) },
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{ S(40, 38), S(49, 41), S(53, 41), S(53, 41),
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S(53, 41), S(53, 41), S(49, 41), S(40, 38) } };
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// Connected pawn bonus by opposed, phalanx, twice supported and rank
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Score Connected[2][2][2][RANK_NB];
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@ -180,19 +180,17 @@ namespace {
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// Score this pawn
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if (isolated)
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score -= Isolated[opposed][f];
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if (!supported && !isolated)
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score -= UnsupportedPawnPenalty;
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if (doubled)
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score -= Doubled[f] / distance<Rank>(s, frontmost_sq(Us, doubled));
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if (backward)
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else if (backward)
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score -= Backward[opposed][f];
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else if (!supported)
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score -= UnsupportedPawnPenalty;
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if (connected)
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score += Connected[opposed][!!phalanx][more_than_one(supported)][relative_rank(Us, s)];
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if (doubled)
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score -= Doubled[f] / distance<Rank>(s, frontmost_sq(Us, doubled));
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if (lever)
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score += Lever[relative_rank(Us, s)];
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}
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