J. Oster 9083050be6 Simplify limiting extensions. ...

Replace the current method for limiting extensions to avoid search getting stuck
with a much simpler method.

the test position in 73018a0337
can still be searched without stuck search.

fixes #3815 where the search now makes progress with rootDepth

shows robust behavior in a d10 search for 1M positions.

passed STC
https://tests.stockfishchess.org/tests/view/61e303e3babab931824dfb18
LLR: 2.94 (-2.94,2.94) <-2.25,0.25>
Total: 57568 W: 15449 L: 15327 D: 26792
Ptnml(0-2): 243, 6211, 15779, 6283, 268

passed LTC
https://tests.stockfishchess.org/tests/view/61e3586cbabab931824e091c
LLR: 2.96 (-2.94,2.94) <-2.25,0.25>
Total: 128200 W: 34632 L: 34613 D: 58955
Ptnml(0-2): 124, 12559, 38710, 12588, 119

closes https://github.com/official-stockfish/Stockfish/pull/3899

Bench: 4550528

2022-01-22 10:48:24 +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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evaluate.cpp

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evaluate.h

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Makefile

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search.cpp

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thread.h

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