10. … P-KR3
If Black plays KKt-K2 at once, his position becomes somewhat cramped after 11. B-Kt5, Castles; 12. Kt-B6ch, K-R1; 13. Q-Q1.
11. B-Q3 Kt-K2 12. Castles Castles 13. Q-B2 P-Kt3
This allows the development of the QB.
14. B-B3 KtxKt 15. KPxKt Kt-K4
Diag. 164
Kt-K2 should have been played here in order to play BxB; 17. QxB, B-Kt5 with Kt-B4, in answer to 16. Q-Kt2. Black is still open to attack in consequence of his broken King’s side, but there is no demonstrable advantage for White. The text move is a mistake, and gives White chances of a decisive attack.
16. KtxKt BxKt 17. BxB PxB 18. BxP! Q-Kt4
Of course not PxB, on account of 19. QxPch, K-R1; 20. QxPch, K- Kt1; 21. R-Kt3, etc. 18. … P-B4 fails because of 19. R-Kt3.