Incredible Attack by Stockfish 16 in the Evans Gambit of the Italian Opening!
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 "2023.07.19"]
[Round "887.2.954"]
[White "Stockfish 16 64-bit"]
[Black "Koivisto 9.0 64-bit"]
[Result "*"]
[WhiteElo "3515"]
[BlackElo "3432"]
[Variant "Standard"]
[TimeControl "-"]
[ECO "C52"]
[Opening "Italian Game: Evans Gambit, Pierce Defense"]
[Termination "Unterminated"]
[Annotator "lichess.org"]
1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 { C52 Italian Game: Evans Gambit, Pierce Defense } 7. Qb3 Qe7 8. O-O Bb6 9. cxd4 Nxd4 10. Nxd4 Bxd4 11. Nc3 Nf6 12. Ba3 d6 13. Rad1 Bxc3 14. Qxc3 Qe5 15. Qc1 O-O 16. Bb2 Qe7 17. e5 Ne8 18. Rfe1 Be6 19. exd6 Nxd6 20. Bb3 Qd8 21. Ba4 Bf5 22. Re5 Bg6 23. Bb3 Kh8 24. Rc5 Rc8 25. h4 b6 26. Rc3 a6 27. h5 Bxh5 28. Rh3 Bg6 29. Qh6 Rg8 30. Rd5 Qe7 31. Re5 Qf6 32. Qc1 Bf5 33. Rh6 Qd8 34. Qf4 Bb1 35. Reh5 Qe8 36. Qg5 f6 37. Rxf6 Qe1+ 38. Kh2 Qe2 39. Rfh6 Rce8 40. f3 Qd3 41. Bd5 Re6 42. Bxe6 Ne8 *
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