Amazing attack by Stockfish 16 in the King’s Indian Defense.
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.
PGN:
[Event “CCRL 40/15”]
[Site “CCRL”]
[Date “2023.08.03”]
[Round “889.5.87”]
[White “Stockfish 16 64-bit 4CPU”]
[Black “Clover 5.0 64-bit 4CPU”]
[Result “1-0”]
[WhiteElo “3540”]
[BlackElo “3457”]
[Variant “Standard”]
[TimeControl “-“]
[ECO “E97”]
[Opening “King’s Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov’s Line”]
[Termination “Unknown”]
[Annotator “lichess.org”]
1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. Re1 { E97 King’s Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov’s Line } f5 11. a4 a5 12. bxa5 Rxa5 13. exf5 Nxf5 14. Bg5 Nf6 15. Bd3 h6 16. Bd2 Ra8 17. a5 g5 18. h3 g4 19. hxg4 Nxg4 20. Ne4 Ra7 21. Nh2 Nxh2 22. Kxh2 Qh4+ 23. Kg1 Nd4 24. Ng3 Bg4 25. Qb1 Raa8 26. Be3 e4 27. Bxe4 Rae8 28. c5 dxc5 29. d6 c6 30. Ra2 Bc8 31. Rc1 Re5 32. Rb2 Kh8 33. Rc4 Qg4 34. a6 bxa6 35. Rb8 Qe6 36. Bxd4 cxd4 37. Rxc6 Rb5 38. Rxb5 axb5 39. Bf5 Rxf5 40. Nxf5 Qxf5 41. Qxf5 Bxf5 42. Rc7 d3 43. d7 Bf6 44. Rc8+ Kh7 { White wins. } 1-0
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