Jonny B. Goode

Jonny – Tech 4
28th World Computer Chess Championship; Santiago de Compostela, October 22, 2024
Clemenz Opening A00

1. h3. The so-called Clemenz Opening. It claims to be just more reserved than 1. g4 (Grob’s Attack); for example: 1. g4 d5 2. f3 e5 3. d3 Qh4+ 4. Kd2 h5 5. h3 hxg4 0–1 侯逸凡 (Hóu Yìfán) – Lalith, 15th Tradewise Gibraltar Chess Festival, Catalan Bay 2017.
1. ... Nf6 2. d4 d5 3. Nf3 e6 4. e3 b6 5. Bb5+ c6 6. Bd3 c5 7. 0-0 Bb7 8. b3 Bd6 9. dxc5 bxc5 10. Bb2 0-0 11. c4 Qe7 12. cxd5 exd5 13. Nbd2 Ne4

The game has now transposed into a kind of Queen’s Indian, where White gives up a Pawn to get the ball rolling.
14. b4!? cxb4 15. Nd4 f5 16. Nb5 Bc5 17. Nxe4 fxe4 18. Be2 a6 19. Nd4 Nd7 20. Rc1 Qe5? The beginning of all trouble. Black should play 20. ... Bb6 21. Ng4 Ne5 22. Ne6 Nd3 23. Bxg7 Nxc1 24. Bxf8 Rxf8 25. Qxc1 Rf6 26. Nf4 d4! 27. exd4 Kh8 with near equality.
21. Bg4 Bd6 22. g3 Nc5 23. Ba1 Qg5. After 23. ... Qe7 24. Nf5 Black has nothing else than to sacrifice the Exchange for no appreciable return. It is quite curious that after the text White is instead happy to give up an Exchange for the triumph of its attack.

24. Rxc5! Bxc5 25. Ne6 Qe7 26. Bxg7 Rf7 27. Bb2 Re8

28. Bf5! Rxf5 29. Qg4+ Rg5 30. Nxg5 Rc8 31. Rc1 a5. If 31. ... Kf8 then 32. Bf6! winning at once.
32. Ne6+ 1–0.