Tone down a bit futility parameters
After 999 games at 1+0 Mod vs Orig +239 =542 -218 +7 ELO Signed-off-by: Marco Costalba <mcostalba@gmail.com>sf_2.3.1_base
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@ -177,7 +177,7 @@ namespace {
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const Value FutilityMarginQS = Value(0x80);
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// Each move futility margin is decreased
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const Value IncrementalFutilityMargin = Value(0xA);
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const Value IncrementalFutilityMargin = Value(0x8);
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// Remaining depth: 1 ply 1.5 ply 2 ply 2.5 ply 3 ply 3.5 ply
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const Value FutilityMargins[12] = { Value(0x100), Value(0x120), Value(0x200), Value(0x220), Value(0x250), Value(0x270),
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@ -1473,7 +1473,7 @@ namespace {
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{
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if (futilityValue == VALUE_NONE)
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futilityValue = evaluate(pos, ei, threadID)
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+ 64*(1+bitScanReverse32(int(depth) * int(depth)));
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+ 64*(2+bitScanReverse32(int(depth) * int(depth)));
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futilityValueScaled = futilityValue - moveCount * IncrementalFutilityMargin;
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