Never send a human to do a machine’s job! - Stockfish 16 vs Lc0

Brutal attack by Stockfish 16 against Leela C Zero in the Tarrasch Variation of the French 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:

[Event “CCRL Blitz”]
[Site “CCRL”]
[Date “2023.07.12”]
[Round “187.6.622”]
[White “Stockfish 16 64-bit 8CPU”]
[Black “Lc0 0.29.0 64-bit w753723 RTX2080”]
[Result “*”]
[WhiteElo “3756”]
[BlackElo “3679”]
[Variant “Standard”]
[TimeControl “-“]
[ECO “C05”]
[Opening “French Defense: Tarrasch Variation, Closed Variation”]
[Termination “Unterminated”]
[Annotator “lichess.org”]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. c3 c5 6. Bd3 Nc6 { C05 French Defense: Tarrasch Variation, Closed Variation } 7. Ngf3 cxd4 8. cxd4 Qb6 9. O-O a5 10. Re1 Be7 11. h3 a4 12. a3 Nxd4 13. Nxd4 Qxd4 14. Nf3 Qb6 15. Ng5 Nc5 16. Bc2 h6 17. Nxf7 Kxf7 18. Qh5+ Kg8 19. Bg6 Qc7?! { (0.96 → 2.05) Inaccuracy. Rh7 was best. } (19… Rh7) 20. Re3 Bg5 21. Rf3 Qxe5 22. Be3 Nd7 23. Be8 Ra6?? { (3.76 → Mate in 4) Checkmate is now unavoidable. Bf6 was best. } (23… Bf6 24. Qf7+ Kh7 25. Qg6+ Kg8 26. Bf4 Ra6 27. Bxe5 Nxe5 28. Qh5 Nxf3+ 29. Qxf3 Rd6 30. Rc1) 24. Qf7+ Kh7 25. Qg6+ Kg8 26. Rf8+ Nxf8 *

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