Immortal Attack by Stockfish 16 in the King’s Gambit
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 “2023.07.09”]
[Round “886.4.341”]
[White “Stockfish 16 64-bit”]
[Black “Fire 9 64-bit”]
[Result “*”]
[WhiteElo “3515”]
[BlackElo “3353”]
[Variant “Standard”]
[TimeControl “-“]
[ECO “C37”]
[Opening “King’s Gambit Accepted: Muzio Gambit, Sarratt Defense”]
[Termination “Unterminated”]
[Annotator “lichess.org”]
1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 { C37 King’s Gambit Accepted: Muzio Gambit, Sarratt Defense } 7. d3 Bc5+ 8. Kh1 Ne7 9. Nc3 d6 10. Bxf4 Nbc6 11. Nd5 Nxd5 12. exd5 Ne7 13. Rae1 Rg8 14. c3 Bg4 15. Qe4 Bf5 16. Qe2 Bg4 17. Qd2 Qg7 18. d4 Bb6 19. h3 Bd7 20. Re3 Qg6 21. Qe2 O-O-O 22. Rxe7 Rde8 23. Rxe8+ Rxe8 24. Qf3 Kb8 25. Bd3 f5 26. Kh2 a6 27. Rf2 a5 28. Bg3 Rf8 29. Re2 Rf7 30. Qf4 Qg8 31. Re3 Qh8 32. b3 a4 33. b4 Ka7 34. Bf2 Ka8 35. Be2 h6 36. Bh4 Rg7 37. Bf3 Bc8 38. Bf6 Rxg2+ 39. Bxg2 Qxf6 40. Re8 Ba7 41. Rxc8+ Bb8 42. Qf1 Qg5 43. Qb5 Qf4+ 44. Kh1 Qc1+ 45. Bf1 Qxf1+ *
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