| 1.Kf5 | Ke3 |
| 2.Ke5 | |
| Now 2... Kd3 loses simply to 3.Kd5 Kc3 4.Kc5 and 5.a4 etc, but Black has... | |
| 2... | c6! |
| 3.a4 | Kd3 |
| 4.a5 | c5 |
| 5.a6 | c4 |
| 6.a7 | c3 |
| 7.a8=Q | c2 |
| At first sight, this looks like a draw, with lines like: [A] 8.Qa3+ Kd2 9.Qb2 Kd1 10.Kd4 c1=Q and White can't play 11.Kd3 [B] 8.Qa3+ Kd2 9.Qa2 Kc3! (9... Kd1 loses to 10.Ke4 c1=Q 11.Kd3) 10.Qa3+ Kd2 draws However, White has... | |
| 8.Qd5+!! | |
| If [A] 8... Ke2 9.Qa2! Kd1 10.Ke4 c1=Q 11.Kd3 winning, or: [B] 8... Kc3 9.Qd4+! Kb3 10.Qa1 winning, so... | |
| 8... | Ke3 |
| If [A] 9.Qh1? Kd2 draws, as does: [B] 9.Qd4+? Ke2 10.Qb2 Kd1, but... | |
| 9.Qg2! | 1-0 |
| Grigoriev (1932) | |