Stockfish 16’s fastest win!
Stockfish continues to demonstrate its ability to discover superior moves with remarkable speed. In self-play against Stockfish 15, this new release gains up to 50 Elo and wins up to 12 times more game pairs than it loses. In major chess engine tournaments, Stockfish reliably tops the rankings winning the TCEC season 24 Superfinal, Swiss, Fischer Random, and Double Random Chess tournaments and the CCC 19 Bullet, 20 Blitz, and 20 Rapid competitions. Leela Chess Zero was the challenger in most finals, putting top-engine chess now firmly in the hands of teams embracing free and open-source software.This updated version of Stockfish introduces several enhancements, including an upgraded neural net architecture (SFNNv6), improved implementation, and refined parameterization. The ongoing utilization of Leela’s data combined with a novel inference approach exploiting sparsity, and network compression ensure a speedy evaluation and modest binary sizes while allowing for more weights and higher accuracy. The search has undergone more optimization, leading to improved performance, particularly in longer analyses. Additionally, the Fishtest framework has been improved and is now able to run the tests needed to validate new ideas with 10000s of CPU cores.Stockfish now comes with documentation, found in the wiki folder when downloading it or on GitHub. Additionally, Stockfish now includes a clear and consistent forced tablebase win score, displaying a value of 200 minus the number of plies required to reach a tablebase win. Furthermore, the UCI_Elo option, to reduce its strength, has been calibrated. It is worth noting that the evaluation system remains consistent with Stockfish 15.1, maintaining the choice that 100cp means a 50% chance of winning the game against an equal opponent. Finally, binaries of our latest development version are now provided continuously as pre-releases on GitHub making it easier for enthusiasts to download the latest and strongest version of the program, we thank Roman Korba for having provided a similar service for a long time.
[Event “CCRL 40/15”]
[Site “CCRL”]
[Date “2023.07.10”]
[Round “886.4.379”]
[White “Stockfish 16 64-bit”]
[Black “Uralochka 3.39d 64-bit”]
[Result “*”]
[WhiteElo “3515”]
[BlackElo “3381”]
[Variant “Standard”]
[TimeControl “-“]
[ECO “B00”]
[Opening “Pirc Defense”]
[Termination “Unterminated”]
[Annotator “lichess.org”]
1. e4 d6 2. d4 Nf6 { B00 Pirc Defense } 3. Nc3 e6 4. Nf3 h6 5. Bd3 Be7 6. a3 d5 7. O-O Nxe4 8. Nxe4 dxe4 9. Bxe4 Nd7 10. c3 O-O 11. Bc2 c5 12. Qd3 Nf6 13. Bf4 Qb6 14. Ne5 cxd4 15. Rad1 a6 16. Rfe1 Rd8 17. Bxh6 dxc3 18. Qg3 Ne8 19. Qh3 Bf6 20. Be3 Rxd1 21. Rxd1 Qc7 22. Qh7+ Kf8 23. Ng6+ *
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