B - K Kt 5 might be better. The text move gives Black an opportunity of which he does not avail himself
| 8. ........ | P - B 3 |
P - B 4 was the right move. It would have led to complications, in which Black might have held his own; at least, White's play would be very difficult. The text move accomplishes nothing, and puts Black
in an altogether defensive position. The veiled threat B × Kt; followed by Q - R 4 ch; is easily met.
| 9. P - B 3 | O - O | |
| 10. B - K Kt 5 | B - K 2 |
The fact that Black has now to move his Bishop back clearly demonstrates that Black's plan of development is faulty. He has lost too much time, and White brings his pieces into their most attacking position without hindrance of any sort.
| 11. B - Q 3 | Kt - K 1 |
The alternative was Kt - Q 4. Otherwise White would play Q - R 3, and Black would be forced to play P - K Kt 3 (not P - K R 3, because of the sacrifice B × P), seriously weakening his King's side.
| 12. Q - R 3 | P - K B 4 |