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Chess engine: Stockfish 21092606 (Windows and Linux)


Stockfish - UCI chess engine, compiled by Michael Chaly
Rating JCER=3517

Timestamp: 1632632294
Extend quiet tt moves at PvNodes
Idea is to extend some quiet ttMoves if a lot of things indicate that the transposition table move is going to be a good move:
1) move being a killer - so being the best move in nearby node;
2) reply continuation history is really good.

This is basically saying that move is good "in general" in this position, that it is a good reply to the opponent move and that it was the best in this position somewhere in search - so extending it makes a lot of sense. In general in past year we had a lot of extensions of different types,
maybe there is something more in it :)

passed STC
LLR: 2.96 (-2.94,2.94) <-0.50,2.50>
Total: 42944 W: 10932 L: 10695 D: 21317 Elo +1.92
Ptnml(0-2): 141, 4869, 11210, 5116, 136
https://tests.stockfishchess.org/tests/view/614cca8e7bdc23e77ceb89f0

passed LTC
LLR: 2.93 (-2.94,2.94) <0.50,3.50>
Total: 156848 W: 39473 L: 38893 D: 78482 Elo +1.28
Ptnml(0-2): 125, 16327, 44913, 16961, 98
https://tests.stockfishchess.org/tests/view/614cf93d7bdc23e77ceb8a13

closes https://github.com/official-stockfish/Stockfish/pull/3719
Bench: 5714575

Stockfish 21092606 NNUE download

 

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