HERE IS THE LINK WHERE YOU CAN DOWNLOAD THE NEW STOCKFISH 15:
DOWNLOAD SOME COOL STOCKFISH 15 GAMES IN PGN FORMAT HERE:
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 OF THE GAME:
Leela C Zero vs Stockfish 15
1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. f4 Qa5 5. Bd3 e5 6. Nf3 Nbd7 7. Be3 Be7 8. h3 exd4 9. Bxd4 Nc5 10. O-O Nxd3 11. Qxd3 O-O 12. Rad1 b5 13. e5 dxe5 14. fxe5 Nd5 15. Ne4 Qd8 16. Nfd2 Nb4 17. Qc3 Nxa2 18. Qe3 Nb4 19. Nf6+ Kh8 20. Nde4 Nxc2 21. Qf2 Nxd4 22. Rxd4 Qb6 23. Kh1 c5 24. Qh4 h6 25. Rd3 Bb7 26. Rd7 Bxe4 27. Rxe7 Bd3 28. Rf3 Rad8 29. Nd7 Rxd7 30. Rxd7 Bg6 31. Qe7 Rg8 32. Rb7 Qc6 33. e6 Qxe6 34. Qxe6 fxe6 35. Rxb5 c4 36. Re5 Bf5 37. g4 Bb1 38. Rxe6 Rb8 39. Rf2 Rb3 40. Kh2 c3 41. bxc3 Rxc3 42. Rf8+ Kh7 43. Re7 Kg6 44. Rxa7 Rc2+ 45. Kg3 Rc3+ 46. Kf4 Rc4+ 47. Ke5 Re4+ 48. Kd6 Rd4+ 49. Kc5 Rd1 50. h4 Rg1 51. Rg8 Kf6 52. Raxg7 Bc2 53. Ra7 Ke5 54. Rf8 Ke4 55. Rf2 Bb1 56. Ra1 Ke5 57. Rb2 Rd1 58. Rbxb1 Rd5+ 59. Kc6 Rd6+ 60. Kc7 Rd4 61. g5 Rc4+ 62. Kd7 Rd4+ 63. Ke7 hxg5 64. hxg5