PROMOTION in 20 Moves! – Stockfish 15 vs Koivisto – D 44 Semi-Slav Defense, Botvinnik Variation

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HERE IS THE LINK WHERE YOU CAN DOWNLOAD THE NEW STOCKFISH 15:

https://stockfishchess.org

DOWNLOAD SOME COOL STOCKFISH 15 GAMES IN PGN FORMAT HERE:
http://ccrl.chessdom.com/ccrl/4040/games.html#by_engine

A new major release of Stockfish is now available at https://stockfishchess.org

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.

PGN:
[Event “CCRL 40/15”]
[Site “CCRL”]
[Date “2022.04.22”]
[Round “820.1.609”]
[White “Stockfish 15 64-bit”]
[Black “Koivisto 8.0 64-bit”]
[Result “1-0”]
[WhiteElo “3528”]
[BlackElo “3421”]
[Variant “Standard”]
[TimeControl “-“]
[ECO “D44”]
[Opening “Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation”]
[Termination “Unknown”]
[Annotator “lichess.org”]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4?! { (0.12 → 0.68) Inaccuracy. h6 was best. } (5… h6 6. Bxf6 Qxf6 7. e3 g6 8. Bd3 dxc4 9. Bxc4 Bg7 10. O-O) 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. g3 { D44 Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation } Rg8 12. h4 Rxg5 13. hxg5 Nd5 14. g6 fxg6 15. Qg4 Qe7 16. Bg2 N7b6 17. Qxg6+ Qf7 18. Be4 Qxg6 19. Bxg6+ Kd7 20. Rh7+ Be7 21. Ne4 Kc7 22. g4 Nd7 23. O-O-O a5 24. Nc3 Nxc3 25. bxc3 Ba3+?! { (1.65 → 2.49) Inaccuracy. Bg5+ was best. } (25… Bg5+) 26. Kc2 Ba6 27. Rdh1 Rd8 28. Bf7 Nf8 29. g5 Nxh7 30. Rxh7 b4 31. g6 Bb5 32. g7 Ba4+ 33. Kd2 c5 34. Be8 bxc3+ 35. Ke2 Bxe8 36. g8=Q+ Rd7 37. Rh6 Bf7 38. Qa8 Kb6 { White wins. } 1-0