It would be no use taking with the KKt, as the threat Kt-Kt4 and Q-R6 must be guarded against. If the other Kt captures there follows: 18. B-K4, R-Kt1; 19. R-B3 and KR-B1.
18. B-K4 B-Kt4
This drives the Rook to a better square, but already now there is no satisfactory move. It would perhaps have been best to parry the threat of BxKt and R-B7 by playing Q-Q3, although the pawn would have to recapture after 19. BxKt, because of 20. R-B5 and KR-B1. The chance of bearing on the QP through the open file, which was probably Black’s intention all along, would then be lost. After the text move, however, White takes possession of the seventh rank, and Black’s game collapses quickly.
19. KR-K1 Q-Q3 20. BxKt PxB 21. Q-R5 P-QR3 22. Q-B7 QxQ 23. RxQ P-R3
Kt-Kt5 and Kt-K6ch was threatened.
24. RxP QR-B1 25. P-QKt3 R-B7 26. P-QR4 B-K7 27. Kt-R4! P-KR4
The KtP cannot be saved.
28. KKtxP R-K1 29. RxPch Resigns.
GAME No. 43
White: Capablanca. Black: Bernstein.