Repeat Third Variation up to Black's tenth move inclusive.
B takes P: ch. Q to R 5
11. -------------- 15. ----------
K takes B P to K R 3
Kt to Q 5 Q to Kt 6
12. ---------- 16. ----------
R to K sq. P takes Kt
B takes Kt Kt to B 6: ch.
13. ---------- 17. --------------
R takes B K to B sq.
Kt to Kt 5: ch. Kt to R 7: ch.
14. --------------- 18. --------------
K to Kt sq. K to Kt sq.
And White draws by perpetual check.