(1) Topalov,Veselin (2805) - Anand,Viswanathan (2787) [D87]
World Chess Championship Sofia/Bulgarien (10), 07.05.2010

1.d4 Nf6 2.c4 g6 3.Nc3 d5
After the traumatizing loss in game one, Anand is finally back with the Gruenfeld, presumably confident a similar disaster is not in store.

4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 0-0 10.0-0 b6
Deviating from game one where he had instead continued with 10...Na5.

11.Qd2 Bb7 12.Rac1 Rc8 13.Rfd1 cxd4 14.cxd4 Qd6N
For all practical purposes, this is the novelty.

15.d5 Na5 16.Bb5 Rxc1 17.Rxc1 Rc8 18.h3 Rxc1+ 19.Qxc1 e6 20.Nf4 exd5 21.Nxd5 f5 22.f3 fxe4 23.fxe4 Qe5 24.Bd3 Nc6 25.Ba6!
Though this move should not give White an edge against best play, the maze Black must steer through is complex, and anything less leaves Topalov better.

Wishing to avoid unnecessary complications, but best was [25...Bxa6 26.Qxc6 Qa1+ 27.Kf2 (27.Kh2 Be5+ 28.Bf4 Bxf4+ 29.Nxf4 Qe5 30.g3 (30.Kg3 g5 31.Qa8+ Kf7 32.Qxa7+ Ke8 33.Qa8+ Ke7= ) 30...Qb2+ 31.Ng2 Bf1 32.Qe8+ And White must take the perpetual.) 27...Qxa2+ 28.Kg3 Qa3! 29.Qa8+ Qf8 30.Qxa7 Be5+ 31.Kh4 Qf1 32.g3 Bc8 33.g4 Bf6+ 34.Nxf6+ Qxf6+= ]

26.Qc4 Bxd5 27.Qxd5+ Qxd5 28.exd5
White has a very favorable endgame thanks to his bishop pair now.

28...Be5 29.Kf2 Kf7 30.Bg5 Nf5 31.g4 Nd6 32.Kf3 Ne8 33.Bc1 Nc7 34.Bd3 Bd6 35.Ke4 b5 36.Kd4 a6 37.Be2 Ke7 38.Bg5+ Kd7 39.Bd2 Bg3 40.g5 Bf2+ 41.Ke5 Bg3+ 42.Ke4 Ne8 43.Bg4+ Ke7 44.Be6 Nd6+ 45.Kf3 Nc4!
Topalov had undoubtedly missed this move, and now the World Champion has almost equalized. There is still play left, but Anand can certainly start breathing calmer now.

46.Bc1 Bd6 47.Ke4 a5 48.Bg4 Ba3 49.Bxa3+ Nxa3 50.Ke5 Nc4+ 51.Kd4 Kd6 52.Be2 Na3 53.h4 Nc2+ 54.Kc3 Nb4 55.Bxb5 Nxa2+ 56.Kb3 Nb4 57.Be2 Nxd5 58.h5 Nf4 59.hxg6 hxg6 60.Bc4 1/2-1/2