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221893bf679f70098e6f751fded2fe843471c6be
Stockfish/src
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Vizvezdenec 221893bf67 Apply multicut pruning more often 
This patch increases number of nodes where we produce multicut cutoffs.

The idea is that if our ttMove failed to produce a singular extension
but ttValue is greater than beta we can afford to do one more reduced search
near beta excluding ttMove to see if it will produce a fail high -
and if it does so produce muticut by analogy to existing logic.

passed STC
https://tests.stockfishchess.org/tests/view/5e9a162b5b664cdba0ce6e28
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 58238 W: 11192 L: 10917 D: 36129
Ptnml(0-2): 1007, 6704, 13442, 6939, 1027

passed LTC
https://tests.stockfishchess.org/tests/view/5e9a1e845b664cdba0ce7411
LLR: 2.94 (-2.94,2.94) {0.25,1.75}
Total: 137852 W: 17460 L: 16899 D: 103493
Ptnml(0-2): 916, 12610, 41383, 13031, 986

closes https://github.com/official-stockfish/Stockfish/pull/2640

bench 4881443
2020-04-18 15:36:41 +02:00
..
syzygy
Small cleanups
2020-04-12 20:30:08 +02:00
benchmark.cpp
Equations for edges and corners.
2020-03-09 22:16:26 +01:00
bitbase.cpp
Small cleanups.
2020-02-05 15:32:29 +01:00
bitboard.cpp
Small cleanups
2020-04-12 20:30:08 +02:00
bitboard.h
Small cleanups
2020-04-12 20:30:08 +02:00
endgame.cpp
remove KNPK endgame code
2020-04-05 08:35:31 +02:00
endgame.h
remove KNPK endgame code
2020-04-05 08:35:31 +02:00
evaluate.cpp
Scale factor in opposite-color bishop endings
2020-04-16 21:40:06 +02:00
evaluate.h
Small cleanups
2020-03-01 09:31:58 +01:00
main.cpp
Small cleanups.
2020-02-05 15:32:29 +01:00
Makefile
Small cleanups
2020-03-01 09:31:58 +01:00
material.cpp
Small cleanups
2020-03-30 22:46:07 +02:00
material.h
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00
misc.cpp
Small cleanups.
2020-02-05 15:32:29 +01:00
misc.h
Fix ambiguity between clamp implementations
2020-03-07 11:14:27 +01:00
movegen.cpp
Small cleanups
2020-04-12 20:30:08 +02:00
movegen.h
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00
movepick.cpp
Always remember the ttMove
2020-04-12 20:34:50 +02:00
movepick.h
Improve move order near the root
2020-02-22 21:32:32 +01:00
pawns.cpp
Simplify minPawnDistance
2020-04-18 15:29:24 +02:00
pawns.h
Scale up space weight with number of blocked pawns
2020-04-13 09:16:54 +02:00
position.cpp
Small cleanups
2020-03-30 22:46:07 +02:00
position.h
Limit array access in Position
2020-04-02 14:40:03 +02:00
psqt.cpp
Small cleanups
2020-04-12 20:30:08 +02:00
search.cpp
Apply multicut pruning more often
2020-04-18 15:36:41 +02:00
search.h
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00
thread_win32_osx.h
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00
thread.cpp
Small cleanups
2020-04-12 20:30:08 +02:00
thread.h
Small cleanups
2020-04-12 20:30:08 +02:00
timeman.cpp
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00
timeman.h
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00
tt.cpp
Small cleanups.
2020-02-05 15:32:29 +01:00
tt.h
Small cleanups
2020-03-14 17:04:50 +01:00
types.h
Small cleanups
2020-04-12 20:30:08 +02:00
uci.cpp
Small cleanups
2020-03-30 22:46:07 +02:00
uci.h
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00
ucioption.cpp
Update lists of authors and contributors
2020-01-09 01:43:47 +01:00