Chess engine: Stockfish 21081809 (Windows and Linux)

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Stockfish - UCI chess engine, compiled by Torsten Hellwig
Rating JCER=3528

Timestamp: 1629271042
Update default net to nn-ac5605a608d6.nnue
This net was created with the nnue-pytorch trainer, it used the previous master net as a starting point.

STC:
LLR: 2.95 (-2.94,2.94) <-0.50,2.50>
Total: 15320 W: 1415 L: 1257 D: 12648 Elo +3.58
Ptnml(0-2): 50, 1002, 5402, 1152, 54
https://tests.stockfishchess.org/tests/view/611c404a4977aa1525c9c97f

LTC:
LLR: 2.94 (-2.94,2.94) <0.50,3.50>
Total: 9440 W: 345 L: 248 D: 8847 Elo +3.57
Ptnml(0-2): 3, 222, 4175, 315, 5
https://tests.stockfishchess.org/tests/view/611c6c7d4977aa1525c9c996

LTC with UHO_XXL_+0.90_+1.19.epd:
LLR: 2.94 (-2.94,2.94) <0.50,3.50>
Total: 6232 W: 1638 L: 1459 D: 3135 Elo +9.98
Ptnml(0-2): 5, 592, 1744, 769, 6
https://tests.stockfishchess.org/tests/view/611c9b214977aa1525c9c9cb

closes https://github.com/official-stockfish/Stockfish/pull/3664
Bench: 5375286

Stockfish 21081809 NNUE download

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