Notice the remarkable position of the pieces. White cannot move anything without incurring some loss. His best chance would have been to play 29 P - K 6, but that would only have prolonged the game, which is lost in any case.

29. K - Kt 1 P - R 6
30. P - Kt 3 P - Q R 3

Again forcing White to move and to lose something thereby, as all his pieces are tied up.

31. P - K 6 R × K P

Not even now can White move the Knight because of P - R 7 ch; K × P, R - R 3 ch; K - Kt 1, R - R 8 mate.

32. P - Kt 4 R - R 3
33. P - B 3

If 33 P - Kt 5, P - R 7 ch; 34 K - R 1, R × Kt; 35 R × R, R × P, winning easily.