10.Kt takes P10.K Kt to K 2
11.B to R 311.Castles
12.Kt to Q 512.Kt takes Kt
13.B takes Kt...

If White were to capture the Rook, the course of the game would probably be as follows—

13.B takes R13.Kt to B 5 (!)
14.Kt to R 414.Q to Kt 5
15.Q to Kt 315.P to Q 4
16.Q takes Q16.B takes Q

And White must lose one of the two attacked Bishops.

13.B takes R13.Kt to B 5 (!)
14.Kt to R 414.Q to Kt 5
15.Q to Kt 315.P to Q 4
16.Q takes Q16.B takes Q
...13.P to Q 3
14.P takes P14.P takes P
15.Q R to Q sq.15.R to Q sq.
16.Q to R 4...

Threatening to win a piece with 17. B takes Kt.

...17.B to Kt 3
18.B takes Kt18.P takes B
19.Q takes B P19.R to Kt sq.
20.R takes P20.B to K 3

The only defence, for Queen and Rook are

attacked, and he cannot play 20. ... R takes R, because of 21. Q to K 8 mate.

21.K R to Q sq.

Threatening 22. R takes R: ch., R takes R: 23. R takes R: ch., B takes R; 24. Q to K 8: mate.