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Remove depth condition for pruning captures.

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The SEE condition alone is sufficient.

passed STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 109863 W: 24339 L: 24392 D: 61132
http://tests.stockfishchess.org/tests/view/5b1f5b000ebc5902ab9c8668

passed LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 23390 W: 4020 L: 3903 D: 15467
http://tests.stockfishchess.org/tests/view/5b1f94b40ebc5902ab9c8b5e

Closes https://github.com/official-stockfish/Stockfish/pull/1648

Bench: 4834747
This commit is contained in:
Joost VandeVondele 2018-06-12 07:32:21 +02:00 • committed by Stéphane Nicolet
parent fc3af7c4fb
commit 6c36e65193
1 changed files with 1 additions and 2 deletions
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3
src/search.cpp
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@ -951,8 +951,7 @@ moves_loop: // When in check, search starts from here
&& !pos.see_ge(move, Value(-35 * lmrDepth * lmrDepth)))
continue;
}
else if ( depth < 7 * ONE_PLY // (~20 Elo)
&& !extension
else if ( !extension // (~20 Elo)
&& !pos.see_ge(move, -Value(PawnValueEg * (depth / ONE_PLY))))
continue;
}