From an Armstrong Cup game played on Wednesday:
Jonathan O’Connor, on X, remarked that “My opponent went downhill very quickly after forgetting his Sveshnikov theory”. This happened around ten moves before the diagrammed position.
Position after 21… Qe3
White now continued 22. Kh3, and the conclusion was 22… Rc4 23. Bxc4 Bc8+ 24. Kh4 Qh6+ 25. Kg3 Ne4+ 26. fxe4 Qf4 mate.