12…♘fxd5 prevents the pin by ♗c1-g5, but allows 13.a3, and 12…♗xd5 13.♗g5 boils down to the same thing.
‘Black’s position resembles a prisoner tied by his legs and arms’ – Krogius.
13…♗e7 14.♗xf6 gxf6 15.♘xd5 ♗xd5 16.♗xd5 exd5 17.♘d4 ♔f8 18.♘f5 h5 19.♖xd5 ♕xd5 20.♕xe7+ ♔g8 21.♕xf6 1-0
14…♗xe4 can be answered with 15.♘d2 as well, or with the simpler 15.♗e2. After the suggested continuation:
when Kan concluded that Black is just fine with two pawns for the exchange, the pair of bishops and a superior pawn structure, and White should play accurately to maintain the balance. In the game, Ufimtsev was not up to the task, and Kan won, thus qualifying for the USSR Championship.
Now, White has a powerful knight on a strong square against Black’s darksquared bishop. The bishop is not a traditionally bad one, due to the pawn structure, but it has no real use or target for now. Korneev brought home the win when the pressure became too much for the weak b6-pawn:
26…♗g7 27.♖ab1 ♕d7 28.♕b5 ♕b7 29.b4 ♖e5 30.c4 ♖e2 31.bxc5 dxc5 32.a5 ♗d4 33.♕xb6 ♕xb6 34.axb6 … 1-0 (63)