7. B-B4 PxP
At this early stage Black has no satisfactory means of development. The QP is attacked three times, and therefore the KP cannot move, nor can the KB be developed at Kt2. B-Kt5, in order to play BxKt and PxP, is refuted by BxPch. The move in the text which brings about the exchange of Queens, but develops another White piece at the same time, is more or less forced. It is instructive to watch how White’s advantage in development soon materialises.
8. KtxP QxQch
9. RxQ KtxKt
10. BxKt P-QR3
White’s threat of B-Kt5ch could not be parried by B-Q2 because of 11. BxPch.
Diag. 141
11. B-B7 B-Kt5 12. P-B3 QR-B1 13. B-Kt6 B-B4 14. B-Kt3 P-K4 15. B-R4ch K-K2 16. P-QB4
Here White could have won a pawn at once by R-Q5. If then K-K3, 17. P-QB4.
16. … P-B3 17. K-B2 K-B2 18. B-Q7! BxB 19. RxBch B-K2 20. KR-Q1!
The pawns can wait. 20. RxP would not have been profitable because of R-QKt1.