| 13. Kt - K 3 | R - K 1 | |
| 14. O - O | Q - K 2 |
This is bad. Black's game was already not good. He probably had no choice but to take the Knight with the Bishop before making this move.
| 15. Kt - Q 5 | B × Kt | |
| 16. P × B | Kt - Kt 1 |
in order to bring it to Q 2, to support the other Knight and also his King's Pawn. White, however, does not allow time for this, and by taking advantage of his superior position is able to win a Pawn.
| 17. P - Q R 4 | P - Kt 5 |
Since he had no way to prevent the loss of a Pawn, he should have given it up where it is, and played Q Kt - Q 2, in order to make his position more solid.
The text move not only loses a Pawn, but leaves Black's game very much weakened.
| 18. P × P | B × P | |
| 19. B × Kt | Q × B | |
| 20. Q - K 4 | B - Q 3 | |
| 21. Q × P ch | K - B 1 |
