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HERE IS THE LINK WHERE YOU CAN DOWNLOAD THE NEW STOCKFISH 15:
stockfishchess.org
DOWNLOAD SOME COOL STOCKFISH 15 GAMES IN PGN FORMAT HERE:
ccrl.chessdom.com/ccrl/4040/ga...
A new major release of Stockfish is now available at 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 "CCC 17 Blitz: Main (5|5)"]
[Site "?"]
[Date "2022.06.10"]
[Round "1"]
[White "Stockfish"]
[Black "Dragon"]
[Result "1-0"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "Standard"]
[TimeControl "300+5"]
[ECO "C19"]
[Opening "French Defense: Winawer Variation, Poisoned Pawn Variation"]
[Termination "Unknown"]
[Annotator "lichess.org"]
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Bxc3+ 6. bxc3 c5 7. Qg4 { C19 French Defense: Winawer Variation, Poisoned Pawn Variation } O-O?! { (0.29 → 0.87) Inaccuracy. Kf8 was best. } (7... Kf8 8. a4 Qc7 9. Qd1 b6 10. Nf3 Kg8 11. Be2 Ba6 12. Bxa6) 8. Bd3 Nbc6 9. Bg5 Qa5 10. Ne2 Ng6 11. O-O Qa4 12. f4 c4 13. Bxg6 fxg6 14. f5 exf5 15. Qg3 Nd8 16. Bxd8 Rxd8 17. Nf4 Qe8 18. h4 Be6 19. Rab1 b6 20. Rf3 Rd7 21. Rbf1 Rc8 22. Qh3 Qe7 23. R3f2 Rf8 24. g4 Qe8?! { (1.08 → 1.83) Inaccuracy. Rdd8 was best. } (24... Rdd8 25. g5) 25. g5 a6?! { (1.37 → 2.10) Inaccuracy. Re7 was best. } (25... Re7 26. Qh1 b5 27. h5 gxh5 28. Nxh5 Rd7 29. Nf4 g6 30. Rh2 Qe7 31. Kf2 Qxa3 32. Nxe6) 26. Rg2 Re7 27. h5 gxh5 28. g6 h6 29. Rh2 Bc8 30. Qg2 Bb7 31. Rxh5 Qa4 32. Qh2 Bc8? { (2.78 → 4.89) Mistake. Bc6 was best. } (32... Bc6 33. Qh4) 33. Qh4 Ra7 34. Nxd5 Qe8 35. Kf2 f4 36. Rxh6 gxh6 37. Qxh6 Qa4 38. Rc1 Bf5 39. Nf6+ Rxf6 40. exf6 Qe8 41. f7+ Rxf7 42. gxf7+ Kxf7 43. Re1 Qd8 44. Qxf4 Qf6 45. Re5 Bd7 46. Ke3 Bc8 47. d5 Kg6 48. Qxf6+ Kxf6 49. Kf4 Bd7 50. Rh5 Kg6 51. Rh8 b5 52. Ke5 b4 53. axb4 Bb5 54. d6 Ba4 55. Rg8+ Kf7 56. Ra8 Bd7 57. Rxa6 Ke8?! { (27.15 → Mate in 11) Checkmate is now unavoidable. Bb5 was best. } (57... Bb5 58. Ra7+) 58. Ra8+?! { (Mate in 11 → 24.19) Lost forced checkmate sequence. Ra7 was best. } (58. Ra7 Kd8 59. Ra8+ Bc8 60. b5 Kd7 61. Ra7+ Ke8 62. b6 Kd8 63. b7 Bxb7 64. Rxb7 Ke8) 58... Kf7 59. Ra7 Ke8 60. b5 Bxb5 61. Ke6 Kf8 62. d7 Bxd7+ 63. Rxd7 Ke8 64. Rd1 Kf8 65. Rg1 Ke8 66. Rg8# { White wins. } 1-0