The object being to play this Knight to K B sq., and then to Kt 3. This
could also be done if White had played 6. Kt to B 3, then Kt to K 2, and Kt
to Kt 3. The manoeuvre in the text is generally adopted, because if 6. Kt
to B 3, Black could "pin" it with 6. ... B to R 4. {356}
... 6. Kt to B 3
7. P to B 3 ...
Intending to advance the Q P, and thus prepare the formation of a strong
centre.
... 7. B to Q 2
Threatening to attack and exchange White's Bishop, by playing upon his next
move, if feasible, 8. ... Kt to Q R 4. He could not have done so before,
because of White's reply, 8. B to Kt 5: ch., forcing the Knight back to B
3, or leaving it at R 4 out of play.