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New History Bonus Formula
bonus = d^2 + d - 1 Bench: 8639247 Resolves #484
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1 changed files with 3 additions and 3 deletions
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@ -1095,7 +1095,7 @@ moves_loop: // When in check search starts from here
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&& is_ok((ss - 1)->currentMove)
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&& is_ok((ss - 2)->currentMove))
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{
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Value bonus = Value((depth / ONE_PLY) * (depth / ONE_PLY));
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Value bonus = Value((depth / ONE_PLY) * (depth / ONE_PLY) + depth / ONE_PLY -1);
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Square prevPrevSq = to_sq((ss - 2)->currentMove);
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CounterMovesStats& prevCmh = CounterMovesHistory[pos.piece_on(prevPrevSq)][prevPrevSq];
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prevCmh.update(pos.piece_on(prevSq), prevSq, bonus);
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@ -1371,7 +1371,7 @@ moves_loop: // When in check search starts from here
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ss->killers[0] = move;
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}
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Value bonus = Value((depth / ONE_PLY) * (depth / ONE_PLY));
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Value bonus = Value((depth / ONE_PLY) * (depth / ONE_PLY) + depth / ONE_PLY -1);
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Square prevSq = to_sq((ss-1)->currentMove);
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CounterMovesStats& cmh = CounterMovesHistory[pos.piece_on(prevSq)][prevSq];
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@ -1401,7 +1401,7 @@ moves_loop: // When in check search starts from here
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{
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Square prevPrevSq = to_sq((ss-2)->currentMove);
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CounterMovesStats& prevCmh = CounterMovesHistory[pos.piece_on(prevPrevSq)][prevPrevSq];
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prevCmh.update(pos.piece_on(prevSq), prevSq, -bonus - 2 * depth / ONE_PLY - 1);
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prevCmh.update(pos.piece_on(prevSq), prevSq, -bonus - 2 * ((depth + 1) / ONE_PLY));
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}
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}
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