Apparently very strong, since it forces the exchange of Rooks because of the threat R - R 3; but in reality it leads to nothing. The best chance was to play R - K K 1.

11. R × R P × R
12. P - B 4

Up to now White had played with finesse, but this last move is weak. R - R 6 was the proper way to continue, so as to force Black to give up his Q R P or Q B P.

12. ........ K - B 1
13. K - Q 2

Again a bad move. 13 R - R 3 was the proper continuation, and if then 13...R - Kt 1; 14 P - Kt 3, K - Kt 2; 15 P - Kt 4, K - R 1; 16 R - Q Kt 3, with excellent winning chances; in fact, I believe, a won game.

13. ........ K - Kt 2

Black misses his only chance. R - Kt 1 would have drawn.