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.
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 Bg4 7. Be2 Nd7 8. O-O e6 9. c4 Bg7 10. a4 O-O 11. a5 Re8 12. a6 b6 13. h3 Bh5 14. d5 cxd5 15. cxd5 exd5 16. Qxd5 Ne5 17. Qb3 Qe7 18. Bf4 Rad8 19. Rad1 Ng6 20. Be3 f5 21. Rde1 Qf8 22. Qb5 Ne5 23. Nd4 Bxe2 24. Nxe2 Qd6 25. Bg5 Rc8 26. Ng3 Qe6 27. Be3 Rcd8 28. Bf4 Rd5 29. Qb3 Rd4 30. Qxe6 Rxe6 31. Be3 Rd5 32. Rd1 Nd3 33. Nxf5 h5 34. Nxg7 Kxg7 35. Rd2 Kg6 36. Rfd1 Red6 37. Kf1 Nb4 38. Ke2 Rxd2+ 39. Bxd2 Nxa6 40. Ra1 Re6+ 41. Kf1 Rd6 42. Bf4 Rf6 43. Be3 Nc7 44. Rxa7 Rc6 45. Bd2 Rc2 46. Ke1 Ne8 47. Ra2 Nc7 48. Kd1 Rc5 49. Ra7 Nd5 50. Ra4 Kf6 51. Rh4 Nc7 52. Be3 Rb5 53. Kc2 Ke6 54. Re4+ Kd7 55. Rf4 Ke6 56. Re4+ Kd7 57. g3 Ne6 58. Rc4 Nc7 59. Rf4 Ke7 60. Re4+ Kd7 61. Rc4 Nd5 62. Bd2 Ne7 63. Rf4 Ke6 64. Re4+ Kd7 65. Rb4 Rc5+ 66. Kd3 Nd5 67. Rd4 Ke6 68. Re4+ Kd7 69. Re5 f6 70. Re4 b5 71. Be3 Nxe3 72. Kxe3 Rc2 73. Rd4+ Ke6 74. Rb4 Rc5 75. Rh4 Kd6 76. b4 Rc3+ 77. Ke4 Ke6 78. Rxh5 Rc4+ 79. Kf3 Rxb4 80. g4 Rb2 81. h4 Rb3+ 82. Kg2 Ke7 83. Rf5 Ke6 84. h5 b4 85. h6 Ra3 86. h7 Ra8 87. Rb5 b3 88. Rxb3 Kf7 89. Rb7+ Ke6 90. Kg3 Ra3+ 91. f3 Ra8 92. Rb6+ Kf7 93. g5 fxg5 94. Rh6 Ra1 95. h8=Q Rg1+ 96. Kf2 Rf1+ 97. Kxf1