Vassily Ivanchuk has a reputation for being brilliant, but erratic. And while his results aren't always what they should be, there is no denying his ability to come up with some amazing moves. In Round 4 of the Meoldy Amber tournament in Monaco he played a brilliant Queen sac against Sergey Karjakin. At first he only gained 2 pawns for the Queen, but very quickly he collected more and more material until he had more than enough compensation.
Ivanchuk,V (2751) - Karjakin,S (2732) [B87]
Amber Rapid Nice FRA (4), 18.03.2008
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 8.Bg5 Be7 9.Qf3 Qc7 10.e5 Bb7 11.exd6 Bxd6 12.Qe3 Bc5 13.0-0-0 Nc6 (D)
14.Qxe6+ fxe6 15.Nxe6 Qe5 16.Nxg7+ Kf8 17.Ne6+ Kf7 18.Rhe1 Qxe1 19.Nxc5+ Kg6 20.Rxe1 Kxg5 21.Nxb7 Nd4 22.Nd6 Rhf8 23.f3 b4 24.Nce4+ Nxe4 25.Rxe4 Nxb3+ 26.axb3 a5 27.Rg4+ Kf6 28.Ne4+ Ke5 29.Rh4 a4 30.bxa4 Rxa4 31.Nc5 Ra1+ 32.Kd2 Rg8 33.g3 Rf1 34.Ke2 Rb1 35.Rxb4 Kd5 36.Ne4 Kc6 37.h4 Rh1 38.Rc4+ Kb6 39.b4 Rd8 40.Rc5 Ra8 41.c3 Ra2+ 42.Ke3 Re1+ 43.Kf4 Rf1 44.Rh5 Ra8 45.Rh6+ Kb5 46.Nd6+ Ka4 47.Rxh7 Kb3 48.Rc7 Rd8 49.Nf5 1-0