| 9. O - O | O - O | |
| 10. P - B 4 |
This move I considered weak at the time, and I do still. It leaves the K P weak, unless it advances to K 5, and it also makes it possible for Black to pin the Kt by B - Q B 4.
| 10. ........ | R - K 1 |
Best. It threatens B - B 4; B - K 3, Kt - Q 4. It also prevents B - K 3 because of Kt - Q 4 or B 4.
| 11. Kt - Kt 3 | P - B 3 |
Preparatory to P - Q Kt 3, followed by P - Q B 4 and B - Kt 2 in conjunction with Kt - Kt 3, which would put White in great difficulties to meet the combined attack against the two centre Pawns.
| 12. P - B 5 |
It has been wrongly claimed that this wins the game, but I would like nothing better than to have such a position again. It required several mistakes on my part finally to obtain a lost position.