Amazing Positional Game by Stockfish 16!
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 Blitz”]
[Site “CCRL”]
[Date “2023.07.09”]
[Round “187.5.856”]
[White “Stockfish 16 64-bit 8CPU”]
[Black “Rebel 16.2 64-bit 8CPU”]
[Result “*”]
[WhiteElo “3756”]
[BlackElo “3638”]
[Variant “Standard”]
[TimeControl “-“]
[ECO “A50”]
[Opening “Slav Indian”]
[Termination “Unterminated”]
[Annotator “lichess.org”]
1. c4 Nf6 2. d4 c6 { A50 Slav Indian } 3. Bf4 d5 4. e3 e6 5. Nc3 Bd6 6. Bg3 h6 7. Nf3 Bxg3 8. hxg3 Nbd7 9. a4 O-O 10. a5 dxc4 11. Bxc4 b5 12. Bd3 Qe7 13. Rc1 Bb7 14. Ne4 Rfc8 15. Nxf6+ Nxf6 16. Rc5 Nd7 17. b4 Nxc5 18. bxc5 Qc7 19. Kf1 Rf8 20. Kg1 f6 21. Bc2 Qxa5 22. Qd3 f5 23. g4 Rae8 24. g5 Qa1+ 25. Kh2 Qa5 26. g4 Qd8 27. Kg3 a5 28. Rh5 Bc8 29. Ne5 hxg5 30. Nxc6 Qf6 31. f4 gxf4+ 32. exf4 Bb7 33. Ne5 Qd8 34. Qd2 Qd5 35. Qh2 Qg2+ 36. Qxg2 Bxg2 37. Kxg2 a4 38. gxf5 exf5 39. d5 g6 40. Rh1 g5 41. d6 Kg7 42. c6 a3 43. Bb3 gxf4 44. Re1 Ra8 45. c7 a2 46. Ra1 Rae8 47. Rxa2 Rxe5 48. d7 Ree8 49. dxe8=N+ Rxe8 50. Be6 Kf6 51. c8=Q Rxc8 52. Bxc8 Ke5 53. Kf3 Kd4 54. Rb2 b4 55. Rxb4+ Kc5 56. Rxf4 *
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