This attack, if not properly met, is extremely embarrassing for Black; but,
against the correct play, it is inferior to the one already given.
... 6. P to Q 4 (best)
7. B takes P 7. Q B to Kt 5
8. R to B 2 8. P to Q B 3
9. B to B 4 9. B to Kt 2
10. P to B 3 10. B to R 3
11. Kt to Q 2 11. Kt to K 2
12. Kt takes P 12. Kt to Kt 3
And Black even without Castling may assume the counter-attack with R to Kt
sq., bringing the Queen into play as soon as feasible.