Amazing attack by Stockfish 16 in the London System 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 "2023.07.23"]
[Round "888.5.169"]
[White "Caissa 1.9 64-bit 4CPU"]
[Black "Stockfish 16 64-bit 4CPU"]
[Result "0-1"]
[WhiteElo "3440"]
[BlackElo "3540"]
[Variant "Standard"]
[TimeControl "-"]
[ECO "A45"]
[Opening "Indian Defense"]
[Termination "Unknown"]
[Annotator "lichess.org"]

1. d4 Nf6 { A45 Indian Defense } 2. Bf4 c5 3. e3 Qb6 4. Na3 Qxb2 5. Nb5 Nd5 6. a3 a6 7. Rb1 Qa2 8. Qc1 axb5 9. Ra1 Qxa1 10. Qxa1 e5 11. dxe5 Nxf4 12. exf4 c4 13. Qb1 Rxa3 14. Qxb5 Nc6 15. c3 d5 16. Nf3 Ra1+ 17. Ke2 Ra2+ 18. Ke1 Ra5 19. Qb1 b5 20. Ng5 b4 21. e6 Bxe6 22. Nxe6 fxe6 23. g3 Be7 24. Bxc4 dxc4 25. cxb4 Nxb4 26. Ke2 c3 27. Qb3 Nd5 28. Qb8+ Bd8 29. Kf3 O-O 30. Qd6 Be7 31. Qxe6+ Kh8 32. Qe4 Rc5 33. Rc1 Bf6 34. Kg2 Rfc8 35. h3 c2 36. Rxc2 Nxf4+ 37. Qxf4 Rxc2 38. h4 Rf8 39. Qf5 Rd2 40. Qc5 Rdd8 41. Qc2 { Black wins. } 0-1

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