Stockfish 16 breaks the MOST IMPORTANT Principle in Chess!!!

Crazy middle game ideas 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 40/15"]
[Site "CCRL"]
[Date "2023.09.01"]
[Round "893.2.368"]
[White "Stockfish 16 64-bit"]
[Black "Velvet 5.3.0 64-bit"]
[Result "*"]
[WhiteElo "3514"]
[BlackElo "?"]
[Variant "Standard"]
[TimeControl "-"]
[ECO "B90"]
[Opening "Sicilian Defense: Najdorf Variation, English Attack"]
[Termination "Unterminated"]
[Annotator "lichess.org"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 { B90 Sicilian Defense: Najdorf Variation, English Attack } e5 7. Nb3 Be6 8. h3 Be7 9. Qf3 b5 10. g4 b4 11. Nd5 O-O 12. Nd2 Nxd5 13. exd5 Bc8 14. Bd3 Nd7 15. Qe4 Nf6 16. Qxb4 a5 17. Qb3 a4 18. Qb4 Ba6 19. Bxa6 Rxa6 20. c4 Qc8 21. Qa3 Bd8 22. Ke2 e4 23. Bd4 Nd7 24. Qe3 Re8 25. b4 h6 26. Qc3 Bg5 27. Rae1 Nf6 28. f4 exf3+ 29. Kd3 Bh4 30. Nxf3 Bxe1 31. Rxe1 Nd7 32. Bxg7 Rxe1 33. Nxe1 Ra8 34. Bd4 Qd8 35. Nf3 f6 36. Nh4 Kf7 37. Nf5 Qc7 38. Qe1 Ne5+ 39. Bxe5 dxe5 40. c5 Kg6 41. Qh4 *

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