11. Q-B4 Kt-B4
so that the pawn B3 should not be “hanging” when the QP moves.
12. Kt-KKt5! BxKt 13. BxB QxB 14. QxKt R-K3
Diag. 114
After the exchanges the position is clearly in favour of White. Against an undeveloped B, which also hampers a Rook, his Knight is mobile. The Black Queen’s side pawns are weak, and give White winning chances even if Black succeeds in playing P-Q4 and bringing the Bishop into play. The move in the text, which covers the pawn at B3, again prepares for P-Q4.
15. Q-Q4 B-Kt2
The only chance lay in the pawn sacrifice by P-QB4, after which the Bishop gets to Kt2 with a threat of mate, and the QR is free.
16. Q-QKt4 B-B1 17. Kt-K4
Fine play. If Black captures the pawn, White obtains a combined attack with Q, R, and Kt, to which Black can only oppose the Q, so that the result cannot be in doubt—e.g. 17. … QxKP; 18. Kt- B5, Q-Q3; 19. Q-QB4, RxRch; 20. RxR, P-KR3; 21. R-K8ch, K-R2; 22. Q-K4ch, P-Kt3 (Q-Kt3?; 23. QxQ, followed by KtxP); 23. Kt-Q3 and R-K7.