Michael Chaly 4d3950c6eb Reintroduce razoring ...

Razoring was simplified away some years ago, this patch reintroduces it in a slightly different form.
Now for low depths if eval is far below alpha we check if qsearch can push it above alpha - and if it can't we return a fail low.

passed STC
https://tests.stockfishchess.org/tests/view/61fbf968d508ec6a1c9f3274
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 226120 W: 61106 L: 60472 D: 104542
Ptnml(0-2): 1118, 25592, 59080, 26078, 1192

passed LTC
https://tests.stockfishchess.org/tests/view/61fcc569d508ec6a1c9f5617
LLR: 2.94 (-2.94,2.94) <0.50,3.00>
Total: 113128 W: 30851 L: 30397 D: 51880
Ptnml(0-2): 114, 11483, 32926, 11917, 124

closes https://github.com/official-stockfish/Stockfish/pull/3921

bench 4684080

2022-02-05 07:40:21 +01:00

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incbin

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nnue

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syzygy

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benchmark.cpp

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2022-01-09 15:49:19 +01:00

bitbase.cpp

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bitboard.cpp

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bitboard.h

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endgame.cpp

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endgame.h

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evaluate.cpp

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evaluate.h

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main.cpp

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Makefile

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2022-02-05 07:33:34 +01:00

material.cpp

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material.h

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misc.cpp

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misc.h

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2022-01-17 19:48:23 +01:00

movegen.cpp

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movegen.h

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movepick.cpp

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movepick.h

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pawns.cpp

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pawns.h

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position.cpp

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position.h

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psqt.cpp

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psqt.h

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search.cpp

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search.h

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simd.h

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thread_win32_osx.h

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thread.cpp

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thread.h

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2022-01-22 10:48:24 +01:00

timeman.cpp

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timeman.h

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tt.cpp

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tt.h

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tune.cpp

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tune.h

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types.h

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2022-02-05 07:30:09 +01:00

uci.cpp

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uci.h

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ucioption.cpp

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