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Ivanchuk, Vassily - Leko, Peter 2009.??.??

Mukachevo (m/1-rapid) 105/17

1.Nf3 Nf6 2.c4 c5 3.d4 cxd4 4.Nxd4 e6 5.g3 Bb4+ 6.Bd2 Bc5 7.Nb3 Be7 8.Bg2 Nc6 9.Nc3 (9.O-O - 32/(67))

9... O-O 10.Rc1 b6 11.Nd5! (11.Nd4)

11... exd5 12.cxd5 Bb7 13.dxc6 dxc6 14.O-O Qc8 (14... Qe8!? 15.Qc2 Qd7 16.Rfd1 ( a) 16.Bxc6 Qh3! 17.Nd4 (17.Bxb7 Ng4!) 17... Rac8 18.Qa4 (18.f3 Bc5!) 18... Rxc6 19.Rxc6 Bc5 20.Nf3 Qd7 21.Ne5 Qxd2 Black has a decisive advantage) ( b) 16.Bf4 c5 17.Rfd1 Qc8 18.Bxb7 Qxb7 19.Nd2 Rad8 20.Nc4 Rfe8 equal chances, quiet position) 16... c5 17.Bf4 Qc8 18.Bxb7 Qxb7 19.Nd2 equal chances, quiet position)

15.Nd4 (15.Bxc6 Bxc6 16.Nd4 Bc5! 17.Nxc6 Qxc6 18.b4 Rfd8 19.bxc5 Ne4 20.cxb6 Qxb6 Black has a decisive advantage)

15... c5 16.Bxb7 (16.Nf5 Qxf5 17.Bxb7 Rad8 18.Ba6 Qh5! (18... Ne4 19.Bd3 Qd5 20.Be3 Ng5 21.Bxg5 Bxg5 22.Rc2 equal chances, quiet position) 19.f3 Qd5 20.Bd3 Qd4+ Black has a moderate advantage)

16... Qxb7 17.Nf5 Rfe8 (17... Ne4 18.Bf4 (18.Bh6 gxh6 19.Qd5 Rab8 Black has a decisive advantage) 18... Bg5 (18... Bf6 19.f3 Ng5 20.Bxg5 Bxg5 21.f4 Bf6 White has moderate counterplay) 19.Bxg5 Nxg5 20.h4 Rfd8 21.Qc2 Ne4 equal chances, quiet position)

18.Bc3 Qe4 (18... Rad8 19.Qa4 (19.Qc2 g6 20.Nh6+ Kf8 equal chances, quiet position) 19... Qd7 (19... g6 20.Qf4 gxf5 21.Qg5+ Kf8 22.Bxf6 Bxf6 23.Qxf6 Qe4 White has a slight advantage) 20.Qxd7 Rxd7 21.Rcd1 Rxd1 22.Rxd1 Kf8 23.f3 Rd8 equal chances, quiet position)

19.Qc2 Qe6 20.b3 (20.Rfd1 Qxa2 21.Nxe7+ Rxe7 22.Bxf6 gxf6 White has sufficient compensation for material deficit)

20... Bf8 21.Bxf6 Qxf6 22.Ne3 (22.e4 Qe6 23.f3 g6 24.Ne3 Bh6 25.Rfe1 Rad8 White has the initiative)

22... Rad8 (22... Qc6 (/\ b5) 23.Rfd1 Rad8 24.Qc4 b5 equal chances, quiet position) (22... Qe6 23.Qc4 Qc6 24.a4 a6 White has moderate counterplay)

23.Rfd1 Qe6 (23... Rd4!? 24.Nd5 Qe5 25.Nf4 Red8 White has moderate counterplay) (23... Qc6 24.Rxd8 Rxd8 25.Rd1 Rxd1+ 26.Qxd1 g6 27.Nd5 Qe6 equal chances, quiet position)

24.Qc4 Qe5 (24... Qxc4 25.bxc4 Rd4 26.Kf1! Red8 27.Nd5 White has a slight advantage)

25.Qa6 (25.Nd5 Rd6 26.Rd2! g6 (26... Red8 27.e4 White has a slight advantage) 27.Rcd1 Qe6 28.Qf4 Red8 29.e4 White has a slight advantage)

25... Qb8 (25... Qb2!? 26.Rb1 (26.Qxa7 Qxe2 White has moderate counterplay) 26... Rxd1+ 27.Rxd1 g6 28.Qxa7 Qxe2 29.Rd7 Rxe3 30.fxe3 Qxe3+ equal chances, quiet position)

26.Nd5! White has a slight advantage (26.a4 g6! /\ Bg7)

26... h5 27.e3 Rd6 28.Nc3 Red8 (28... h4!?)

29.Rxd6 Rxd6 30.h4 g6 31.Ne4 Rd8 32.a4 Qa8 (32... Bg7 33.Qc4 (33.a5 Qc7 34.b4 Qe7 35.bxc5 Qxe4 36.cxb6 axb6 37.Rc8 Qe8 38.Rxd8 Qxd8 39.axb6 Be5 Black has a slight advantage) 33... Qe5 34.b4 White has a slight advantage)

33.Qc4 Bg7 34.b4! cxb4 35.Qxb4 Qd5? (35... Qb7 36.Rc4 a6 equal chances, quiet position)

36.Qe7 White has severe time control pressure Qd7 (36... Rf8 37.Ng5 a6 38.Rc7 b5 39.axb5 axb5 40.Rb7 Bh6 41.Rd7 Qc4 42.Ne4 White has a slight advantage)

37.Rc7 (37.Qxd7 Rxd7 38.Rc8+ Kh7 39.Ng5+ Kh6 equal chances, quiet position)

37... Qxe7 38.Rxe7 (R 9/i)

38... a5 39.Kg2 Rd1 40.Re8+?! (40.Rb7 Ra1 41.Rxb6 Rxa4 42.Rb8+ Bf8 43.Nc5 Rb4 44.Ra8 Kg7 45.Rxa5 White has a moderate advantage)

40... Bf8 41.Rb8 (41.Nc3 Ra1 42.Kf3 Kg7 43.Rb8 Bb4 44.Ne4 Rxa4 45.Rxb6 Ra2 46.Rb7 Be1 equal chances, quiet position)

41... Ra1 42.Rxb6 Rxa4 43.Nf6+ Kg7 44.Ra6 Ra1 (44... Bb4 45.f4 Ra2+ 46.Kf3 Ra1 47.Nd5 Bc5 equal chances, quiet position)

45.Ne8+ Kg8 46.Ra7 a4 (46... Bc5! 47.Rc7 Rc1 48.Nf6+ Kg7 49.Ne8+ Kg8)

47.Nf6+ Kg7 48.Ne4 Kg8 (48... a3 49.Ng5 Ra2 50.Rxf7+ Kg8 51.Ra7 Bb4 White has a slight advantage)

49.Ng5 f6 (49... Bc5 50.Rxf7 Rb1 (50... a3 51.Rf6 Kg7 52.Ra6 Bb4 53.Ne6+ Kh7 54.Ra4 Rb1 55.Nf4 White has a moderate advantage) 51.Rc7 a3 52.Rc8+ Kg7 53.Ra8 Be7 54.Ra7 Kg8 55.Nf3 White has a slight advantage)

50.Ne6 Bh6 51.Nd4 (51.Nc7 Kf7 52.Na6+ Kg8 53.Nb4 /\ Nd5)

51... Bf8 (51... a3 52.Nc2 Ra2 53.Nb4 Ra1 54.Kf3 Bf8 55.Nd5 Bg7 56.Nf4 White has a slight advantage) (51... Ra2! 52.Kf3 a3 53.Ke4 f5+ 54.Kd5 Bf8 55.Ra8 Kf7 56.Ra7+ Kg8 57.Ne6 Bb4 equal chances, quiet position)

52.Ne2 Bh6? (52... Bc5 53.Ra5 (53.Ra6 Kf7 54.Nf4 Ra2 55.Nd5 Rd2! White has moderate counterplay) 53... Bd6 equal chances, quiet position)

53.Nc3 a3 54.Nd5 Bg7 55.Nf4 (55.Kf3 Ra2 56.Nb4 Rb2 57.Nd3 Ra2 58.Nf4 White has a slight advantage)

55... Bf8 56.Nxg6 White has a moderate advantage Bc5 57.Ra8+ Kf7 58.Nf4 Rb1 (58... Rd1 59.Ra5 Be7 60.Nxh5 Rd2 61.Ra7 a2 62.g4 Kg8 63.Kf3 White has a moderate advantage)

59.Kf3? (59.Ra5! Rd1 60.Kf3 Be7 61.Ra7 White has a decisive advantage)

59... Rb3? White has severe time control pressure (59... Rb7! 60.Ra5 Bb4 61.Ra6 Rb5 62.Ra7+ Kg8 63.Nd3 (63.Ra8+ equal chances, quiet position) 63... Ra5 64.Rxa5 Bxa5 65.Nc1 Kf7 66.Ke2 Kg6 67.Kd1 Kf5 68.Kc2 Ke4 equal chances, quiet position)

60.Ra5! Bb6 61.Ra6 Bc5 62.Nd5 f5 63.Ra5! Bd6 64.Nf4 Rb2 (64... Bxf4 65.Kxf4 White has a decisive advantage)

65.Rxf5+ Ke8 66.Rxh5 Kd7 67.Ra5 Kc6 68.Ne2 Kb6 69.Ra4 Bb4 70.h5 Kb5 71.Ra8 a2 (71... Rxe2 72.Kxe2 Ba5 73.h6 a2 74.h7 a1=Q 75.h8=Q White has a decisive advantage)

72.h6 Rxe2 73.Kxe2 Ba5 74.Rb8+ Bb6 75.h7 a1=Q 76.h8=Q Qa2+ 77.Kf1 1-0