If 6. Kt takes Kt P, Black replies 6. ... P to Q 4; 7. Kt to B 2, Kt to
K 2; 8. P takes P, Castles; 9. B to K 2, Kt to B 4, with the better
game.
... 6. Kt to K B 3
7. Kt to Q B 3 7. P to Q 3
8. Kt to Q 3 8. Kt to R 4
9. Kt takes P 9. Kt to Kt 6
10. R to R 2 10. Castles
11. Q to Q 3 11. Kt takes B
12. K takes Kt 12. Kt to B 3
And Black has a good game.