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Singular extension search tweak

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Tweak depth.

STC https://tests.stockfishchess.org/tests/view/5f2d22ec61e3b6af64881f40
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 17984 W: 2603 L: 2441 D: 12940
Ptnml(0-2): 133, 1751, 5094, 1849, 165

LTC https://tests.stockfishchess.org/tests/view/5f2d5a6a61e3b6af64881f7f
LLR: 2.95 (-2.94,2.94) {0.25,1.75}
Total: 85808 W: 5956 L: 5621 D: 74231
Ptnml(0-2): 149, 4748, 32785, 5063, 159

closes https://github.com/official-stockfish/Stockfish/pull/2950

fixes two README.md typos:
fixes https://github.com/official-stockfish/Stockfish/issues/2932

bench: 4022669
This commit is contained in:
Unai Corzo
2020-08-08 22:03:37 +02:00
committed by Joost VandeVondele
parent 6d6267c378
commit 1949eb8604
2 changed files with 3 additions and 3 deletions
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2
src/search.cpp
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@@ -1072,7 +1072,7 @@ moves_loop: // When in check, search starts from here
// then that move is singular and should be extended. To verify this we do
// a reduced search on all the other moves but the ttMove and if the
// result is lower than ttValue minus a margin, then we will extend the ttMove.
if ( depth >= 6
if ( depth >= 7
&& move == ttMove
&& !rootNode
&& !excludedMove // Avoid recursive singular search