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1 changed files with 3 additions and 2 deletions
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@ -784,8 +784,9 @@ Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, boo
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// check at our previous move we look at static evaluation at move prior to it
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// and if we were in check at move prior to it flag is set to true) and is
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// false otherwise. The improving flag is used in various pruning heuristics.
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improving = (ss - 2)->staticEval != VALUE_NONE ? ss->staticEval > (ss - 2)->staticEval
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: (ss - 4)->staticEval != VALUE_NONE && ss->staticEval > (ss - 4)->staticEval;
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improving = (ss - 2)->staticEval != VALUE_NONE
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? ss->staticEval > (ss - 2)->staticEval
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: (ss - 4)->staticEval != VALUE_NONE && ss->staticEval > (ss - 4)->staticEval;
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// Step 7. Razoring (~1 Elo)
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// If eval is really low check with qsearch if it can exceed alpha, if it can't,
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