Monster Tactic! | Stockfish vs Leela C Zero | TCEC Season 23 Superfinal - Wade - Tartakower Defense

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Stockfish 15 continues to push the boundaries of chess, providing unrivalled analysis and playing strength. In our testing, Stockfish 15 is ahead of Stockfish 14 by 36 Elo points and wins nine times more game pairs than it loses.
Improvements to the engine have made it possible for Stockfish to end up victorious in tournaments at all sorts of time controls ranging from bullet to classical and even at Fischer random chess. At CCC, Stockfish won all of the latest tournaments: CCC 16 Bullet, Blitz and Rapid, CCC 960 championship, and the CCC 17 Rapid. At TCEC, Stockfish won the Season 21, Cup 9, FRC 4 and in the current Season 22 superfinal, at the time of writing, has won 16 game pairs and not yet lost a single one.
This progress is the result of a dedicated team of developers that comes up with new ideas and improvements. For Stockfish 15, we tested nearly 13000 different changes and retained the best 200. These include the fourth generation of our NNUE network architecture, as well as various search improvements. To perform these tests, contributors provide CPU time for testing, and in the last year, they have collectively played roughly a billion chess games. In the last few years, our distributed testing framework, Fishtest, has been operated superbly and has been developed and improved extensively. This work by Pasquale Pigazzini, Tom Vijlbrief, Michel Van den Bergh, and various other developers is an essential part of the success of the Stockfish project.
Indeed, the Stockfish project builds on a thriving community of enthusiasts to offer a free and open-source chess engine that is robust, widely available, and very strong. We invite our chess fans to join the Fishtest testing framework and programmers to contribute to the project.
[Event "TCEC Season 23 - Superfinal"]
[Site "tcec-chess.com"]
[Date "2022.11.07"]
[Round "46.1"]
[White "Stockfish dev16_20221027"]
[Black "LCZero 0.30-dag-9a9c42d_784968"]
[Result "1-0"]
[WhiteElo "3625"]
[BlackElo "3599"]
[Variant "Standard"]
[TimeControl "7200+12"]
[ECO "A46"]
[Opening "Indian Defense: Wade-Tartakower Defense"]
[Termination "Unknown"]
[Annotator "lichess.org"]
1. d4 Nf6 2. Nf3 d6?! { (0.12 → 0.70) Inaccuracy. e6 was best. } { A46 Indian Defense: Wade-Tartakower Defense } (2... e6 3. c4 d5 4. Nc3 c6 5. e3 Nbd7 6. Be2 b6 7. O-O) 3. Nc3 Bf5 4. g3 Nbd7?! { (0.16 → 0.81) Inaccuracy. d5 was best. } (4... d5 5. Nh4 Bd7 6. Bg2 e6 7. e4 Nxe4 8. Nxe4 dxe4 9. Bxe4) 5. Nh4 Be4 6. f3 Bg6 7. e4 e6 8. Qe2 c6 9. Bd2 d5 10. O-O-O dxe4 11. Nxe4 Bh5 12. Ng5 h6 13. Nh3 g5 14. g4 Be7 15. gxh5 gxh4 16. Nf4 Qb6 17. Bh3 Qxd4 18. Ng6 fxg6 19. Bc3 Qc5? { (1.05 → 2.47) Mistake. Qf4+ was best. } (19... Qf4+ 20. Kb1 O-O-O 21. Bxe6 Bd6 22. Bxf6 Qxf6 23. Rxd6 Kc7 24. Rxd7+ Rxd7 25. Bxd7 Kxd7 26. hxg6) 20. Rhe1 e5 21. hxg6 Rg8 22. f4 Rd8? { (0.95 → 2.22) Mistake. O-O-O was best. } (22... O-O-O 23. Bxe5 Nd5 24. Kb1 b5 25. Qe4 Kb7 26. Bd4 Qd6 27. Be6 N7f6 28. Bxf6 Bxf6 29. Bxg8) 23. fxe5 Nd5 24. Qh5 Bg5+ 25. Bd2 Qe7 26. g7+ Qf7 27. Qxf7+ Kxf7 28. e6+ Kg6 29. Bxg5 hxg5 30. exd7 Kxg7 31. Re5 Kf6 32. Rde1 Kg6 33. Bf5+ Kf6 34. Bg4 Kg6 35. h3 Rgf8 36. Rd1 Rh8 37. c4 Nf6 38. Rd6 Kf7 39. Be6+ Kf8 40. Rd1 Rh5 41. Rf1 Rh6 42. b4 Rg6 43. Bf5 Rh6 44. Be6 Rg6 45. Kb2 Kg7 46. Bf5 Rh6 47. c5 Kg8 48. Rd1 Kf7 49. Be6+ Kf8 50. Rf1 Rg6 51. Ka3 Kg7 52. Bf5 Rh6 53. Rd1 Kf7 54. Be6+ Kf8 55. Rxg5 Ne4 56. Re5 Nf6 57. b5 Rh5 58. Rxh5 Nxh5 59. bxc6 bxc6 60. Rd6 Nf6 61. Rxc6 Nxd7 62. Rd6 Ke7 63. Rxd7+ Rxd7 64. Bxd7 Kd8 65. c6 Kc7 66. Kb4 Kd6 67. a4 Kd5?! { (75.23 → Mate in 16) Checkmate is now unavoidable. Ke7 was best. } (67... Ke7 68. Kc5) 68. c7 Ke4 69. Kc3 Kf3 70. c8=Q Kg2 71. Qf8 Kg3 72. Bc6 Kxh3 73. Qf3+ Kh2 74. Qg2# { White wins. } 1-0

[@joseraulcapablanca8564]

Those two knights on the h-file were surprisingly strong and the longterm rook sacrifice was great too. Thanks Josip and keep up the good work.

[@luisllontopbarahona3188]

Marvelous game and tactic…. Learned a lot with that Knight move. Thank you for sharing

[@bojanboskovic6744]

A46 Wade-Tartakower Defense, Death Star, my friend!

[@gheffz]

Love the game and analysis. Thank you.

[@adrianjamesgamboa5236]

That endgame was amazing. Stockfish made Leela act as if she's in a zugzwang, even though there were a lot of moves black can play. Definitely a modern, better evolution of the zugzwang even compared to Leela's and Alpha0's zugzwangs. Pawn sac that leads to knight sac that leads to zugzwang in 15+ moves!

[@trumplostlol3007]

Stockfish isn't really pushing boundaries in terms of new development of AI. It is only faster by utilizing gpu resources and perhaps some slight improvement in its searching algorithm. Leela hasn't really improved too much since Alpha 0. If Google continues to improve Alpha 0, it would be totally different now. Google basically has stopped doing anything cause its ultimate goal is not to make the greatest chess engine, but to experiment on self learning AIs.