You may well have identified Monday’s position as coming from the Famous Game Geller – Euwe from the 1953 Candidates’ Tournament, which I’m thinking about using in Chess Heroes: Games Book 2.

The game continued 24. Rc1 Rxg2+ 25. Kf1 Qb3 26. Ke1 Qf3 0-1, but Geller missed a miraculous save here.

Try 24. d5!! instead. Now after 24… Qxd5? the black bishop no longer has direct control of e4, so 25. Re4! is winning for White. And after 24… Bxd5! the black queen no longer has direct access to c4.

The game might continue 25. Rd1! (necessary to interpose after Qb6+ 25… Rxg2+ 26. Kf1 (when Qc4+ is no longer possible) 26… Ra2 27. Bd2 Bc4+ 28. Rxc4 Qxc4+ 29. Ke1 Qe6+ 30. Kf1 Qc4+ with a perpetual check.

You’ll observe that 25. d5!! is another queen/bishop Novotny: the same very rare tactic I showed you in last week’s endgame study. I told you it might come in useful one day!