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 OF THE GAME:
Koivisto vs Stockfish 15
1. e4 c5 2. Nc3 d6 3. g3 g6 4. d3 Bg7 5. Nge2 Nc6 6. Bg2 Rb8 7. O-O b5 8. a3 Nf6 9. d4 O-O 10. e5 dxe5 11. Bxc6 cxd4 12. Ne4 Bf5 13. Qd3 Kh8 14. g4 Bxg4 15. Nxf6 exf6 16. c3 Bf5 17. Be4 Bxe4 18. Qxe4 f5 19. Qd3 e4 20. Qg3 d3 21. Nd4 Qd7 22. h4 Rbe8 23. Bf4 a5 24. Rad1 h6 25. Be3 Re7 26. Qh3 h5 27. Bg5 Rfe8 28. Bxe7 Rxe7 29. Rfe1 b4 30. axb4 axb4 31. Qe3 bxc3 32. bxc3 Kh7 33. Nf3 Bf6 34. Ng5+ Kg7 35. c4 Qc7 36. Qc1 Bd4 37. Kg2 Qc5 38. Qf4 Bc3 39. Rf1 Be5 40. Qc1 Bc7 41. Qe3 Qe5 42. Rh1 f6 43. Nf3 Qe6 44. Nd2 f4 45. Qh3 Qg4+ 46. Qxg4 hxg4 47. Rhe1 f3+ 48. Kg1 f5 49. Nb3 Re5 50. Nc1 Rc5 51. Nxd3 exd3 52. Rxd3 Rxc4 53. Red1 Kh6 54. Rd4 Rc3 55. R4d3 Rc4 56. Rd4 Rc6 57. Rd7 Be5 58. R7d5 Bb2 59. R5d2 Ba3 60. Rd7 Bc5 61. Kf1 Bb4 62. Kg1 Rc2 63. Rd8 Bc5 64. R1d2 Rxd2 65. Rxd2 g3 66. Rd3 Bxf2+ 67. Kf1 Kh5 68. Rxf3 Kg4 69. Rc3 f4 70. Kg2 Bd4 71. Rb3 Bf6 72. Rd3 Bxh4 73. Rc3 Bf6 74. Rd3 Be5 75. Ra3 g5 76. Ra4 Kf5 77. Ra6 g4 78. Ra4 f3+ 79. Kg1 g2 80. Rc4 Bf4 81. Rc3 Ke4 82. Kf2 Kd4 83. Ra3 Be3+ 84. Kg3 g1=Q+ 85. Kh4 f2 86. Rxe3 f1=Q 87. Rf3 gxf3 88. Kh5 Qh3#
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after Johann played excellently.
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