Amazing attack by Stockfish 16 in the closed Sicilian as black.
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 “2023.07.20”]
[Round “887.6.89”]
[White “SlowChess Blitz 2.9 64-bit 4CPU”]
[Black “Stockfish 16 64-bit 4CPU”]
[Result “0-1”]
[WhiteElo “3459”]
[BlackElo “3540”]
[Variant “Standard”]
[TimeControl “-“]
[ECO “B81”]
[Opening “Sicilian Defense: Scheveningen Variation, Keres Attack”]
[Termination “Unknown”]
[Annotator “lichess.org”]
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 { B81 Sicilian Defense: Scheveningen Variation, Keres Attack } h6 7. Be3 a6 8. f3 b5 9. Qd2 b4 10. Na4 Nbd7 11. O-O-O Ne5 12. Qxb4 Bd7 13. Bf4 g5 14. Bd2 Be7 15. Qa3 Rb8 16. Bb4 Qc7 17. Kb1 h5 18. gxh5 g4 19. Bxa6 gxf3 20. Nc3 Qb6 21. Ncb5 Ra8 22. Bxd6 Rxa6 23. Qxa6 Qxa6 24. Nc7+ Kd8 25. Nxa6 Bxd6 26. Nxf3 Nxf3 27. Rxd6 Nxe4 28. Rb6 Rxh5 29. b3 Nf2 30. Rc1 e5 31. Nc5 e4 32. b4 Bc8 33. Rd6+ Ke7 34. Rc6 Rh8 35. Rc7+ Kf6 36. Nb3 Be6 37. a4 Rd8 38. Nc5 e3 39. Nxe6 fxe6 40. Rc3 Nd1 41. Rxe3 Nxe3 42. Ka2 e5 43. a5 e4 44. a6 { Black wins. } 0-1
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