A better plan would have been to play R - K 1, threatening P - K 6.

18. ........ R × R
19. R × R R - K 1
20. P - B 3 P - Q B 3

Of course if B × P; Kt × B, Q × Kt; R - K 3. Black with a Pawn minus fights very hard.

21. R - K 3

The Pawn had now to be defended after Black's last move, because after B × P; Kt × B, Q × Kt;

R - K 3, Black could now play Q - Kt 1 defending the Rook.

21. ........ P - Q B 4
22. K - B 2 P - Kt 3
23. P - R 4

White's plan now is to fix the Queen's side in order to be able to manœuvre freely on the other side, where he has the advantage of material.

23. ........ Q - Q 2
24. R - Q 3 Q - B 1
25. Q - K 4 Q - K 3
26. R - Q 5 K - B 1
27. P - B 4 K - Kt 1