zydeco: Very high class game.
Smyslov had to calculate that 17.cxd5 Nf4 18.Qe4 Nxd3 19.dxc6 Bxh4 leads to nothing.
According to Smyslov, Bondarevsky planned a pawn sacrifice with 20.f4 Bxb5 21.axb5 Nxd4 22.Qf2 Nf5 23.g4 Nd6 24.g5 Nfe4 25.Qg2.
20....Nb4! drastically alters the position. Once black exchanges knight for bishop, he has all the long-term prospects.
Smyslov seems impressed with 26.a5 - "a clever way of complicating the struggle anew."
Smyslov criticizes 30.Ne2. White could have complicated the game with 30.Na4.
Smyslov passed up the opportunity to win the exchange with 36....Nc4 37.Qc3 b2 38.Qxc2 bxa1=Q when white has a freer position.
With 44....Bd1 black threatens 45.....Qe2+ 46.Qxe2 Bxe2 47.Kxe2 b2.
If 47.c6 b2 48.c7 Bg4.
If 45.h3 black triangulates to make sure the bishop reaches e2 with check: 45....Qf4+ 46.Kg1 Qe3+ 47.Kf1 Qe2+!