| 17. ........ | Q - K Kt 4 | |
| 18. P - B 4 | Q - Kt 2 | |
| 19. B - B 3 |
In such positions it is generally very advantageous to get rid of the Black Bishop controlling his Q R 3 and Q B 3, which form "holes" for White's pieces. The Bishop in such positions is of very great defensive value, hence the advantage of getting rid of it.
| 19. ........ | K R - K 1 | |
| 20. B × B | K × B | |
| 21. P - Q B 5 ! | P - B 3 |
White threatened P - B 6 ch.
| 22. Kt - B 3 | Q - B 1 |
To prevent the Knight from moving to Q 6 via Q 2 and K 4 or Q B 4. It is self-evident that White has a great advantage of position.
| 23. Kt - Q 2 ? |
I had considered R - Kt 3, which was the right move, but gave it up because it seemed too slow, and