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Chess engine: Stockfish 21120920 NNUE (Windows and Linux)

on


Stockfish - UCI chess engine, compiled by Michael Chaly
Rating CEDR=3375 (1 place)

Timestamp: 1639079400
Adjust singular extension depth restriction

This patch is a modification of original idea by lonfom169 which had a good yellow run - do singular extension search with depth threshold 6 unless this is a PvNode with is a part of a PV line - for them set threshold to 8 instead.

Passed STC
https://tests.stockfishchess.org/tests/view/61b1080406b4c2dcb1b1128c
LLR: 2.95 (-2.94,2.94) <0.00,2.50>
Total: 84352 W: 21917 L: 21555 D: 40880 Elo +1.49
Ptnml(0-2): 288, 9524, 22185, 9896, 283

Passed LTC
https://tests.stockfishchess.org/tests/view/61b1860a06b4c2dcb1b134a1
LLR: 2.95 (-2.94,2.94) <0.50,3.00>
Total: 63520 W: 16575 L: 16237 D: 30708 Elo +1.85
Ptnml(0-2): 27, 6519, 18350, 6817, 47
bench 4729473

Stockfish 21120920 NNUE download

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