Stockfish 16 Exposes the Berlin Defense - Sf vs Ethereal - C67 Berlin Defense, l'Hermet Variation

Описание: Great attack by Stockfish 16 against the Berlin 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 OF THE GAME:

[Event "CCRL 40/15"]
[Site "CCRL"]
[Date "2023.07.09"]
[Round "886.4.353"]
[White "Stockfish 16 64-bit"]
[Black "Ethereal 14.00 64-bit"]
[Result "*"]
[WhiteElo "3515"]
[BlackElo "3439"]
[Variant "Standard"]
[TimeControl "-"]
[ECO "C67"]
[Opening "Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense"]
[Termination "Unterminated"]
[Annotator "lichess.org"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 { C67 Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense } 9. h3 Ke8 10. Nc3 a5 11. Rd1 Be6 12. g4 Ne7 13. Nd4 Bd7 14. Kg2 a4 15. Kg3 a3 16. b3 Nd5 17. Ne4 c5 18. Nf5 Bc6 19. Bh6 Rg8 20. Bxg7 Bxg7 21. Nxg7+ Rxg7 22. Rxd5 Rg6 23. c4 Bxd5 24. cxd5 Rd8 25. f4 Rxd5 26. Nf6+ Rxf6 27. exf6 b5 28. g5 Rd2 29. Kg4 Rh2 30. Re1+ Kd8 31. Kg3 Rc2 32. f5 Rc3+ 33. Kg4 Rc2 34. Kg3 Rc3+ 35. Kg4 *

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