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Reduce increase progression of aspiration window
Currently, in case of fail high/low we research with a window increased by 2*AspirationDelta at first attempt, this patch instead makes the research be done with an increase of just AspirationDelta size, in case of a consecutive fail we will widen to 2*AspirationDelta and so on. After Joona's test: Orig - Mod: 850 - 890 Signed-off-by: Marco Costalba <mcostalba@gmail.com>
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1 changed files with 2 additions and 2 deletions
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@ -931,8 +931,8 @@ namespace {
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print_pv_info(pos, ss, alpha, beta, value);
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// Prepare for a research after a fail high, each time with a wider window
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researchCountFH++;
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*betaPtr = beta = Min(beta + AspirationDelta * (1 << researchCountFH), VALUE_INFINITE);
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researchCountFH++;
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} // End of fail high loop
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@ -1017,8 +1017,8 @@ namespace {
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break;
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// Prepare for a research after a fail low, each time with a wider window
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researchCountFL++;
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*alphaPtr = alpha = Max(alpha - AspirationDelta * (1 << researchCountFL), -VALUE_INFINITE);
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researchCountFL++;
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} // Fail low loop
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