| 1.f7 | |
| No prizes for the first move - Black must now restrain the pawn, but neither 1... Rf6
(2.Bb2) nor 1... Rg8 (2.fxg8=Q+ Kxg8 3.Ne7+ and 4.Nxc8) are possible |
| 1... | Ra6+ |
| 2.Ba3! | |
| A pleasing move, though there was no choice: 2.Kb1? Bxf5+ or 2.Kb2? Rf6 |
| 2... | Rxa3+ |
| 3.Kb2 | |
| Now it looks as though Black can resign, but there is some interesting counterplay... |
| 3... | Ra2+! |
| The rook is untouchable because of 4... Be6+ and a draw. The White king must avoid
the a2-g8, b1-h7, f1-a6, h3-c8, and a4-e8 diagonals |
| 4.Kc1! | |
| After 4.Kc3 Rc2+ there is no win |
| 4... | Ra1+ |
| 5.Kd2 | Ra2+ |
| 6.Ke3 | Ra3+ |
| 7.Kf4 | Ra4+ |
| 8.Kg5 | Rg4+! |
| If 9.Kxg4 Bxf5+ 10.Kxf5 Kg7 11.Ke6 Kf8 draws |
| 9.Kh6! | |
| Now a rook sacrifice cannot save Black. If 9... Rg6+ 10.Kxg6 Bxf5+ 11.Kh6! |
| 9... | Rg8! |
| 10.Ne7! | Be6 |
| The last line of defence |
| 11.fxg8=Q+! | Bxg8 |
| 12.Ng6# | |
| Korolkov (1951) |