Vasily Ivanchuk defeated the Czech number one David Navara 5.5-2.5 in Rapid Chess match just completed at Prague. Ivanchuk won another game on the fourth and final day given below. His tenth move varied from game six that we saw yesterday and White's response was probably wrong as he loses a pawn for nebulous compensation.

D Navara - V Ivanchuk

Cez Trophy Rapid Prague (7)

Gruenfeld Defence g3

1.Nf3 Nf6 2.c4 g6 3.d4 Bg7 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6 7.Nc3 Nc6 8.e3 0-0 9.0-0 Re8 10.Re1

(10.d5 Na5 11.Nd4 Bd7 Karpov-Navara CEZ Trophy 2005)

10...a5

(10...e5 11.d5 Na5 12.e4 c6 13.Bg5 (13.b3! - see yesterday's column) 13...f6 14. Be3 Nac4 15.dxc6 Nxe3 16.Qxd8 Rxd8 17.cxb7 Bxb7 18.Rxe3 Bh6 with play for the pawn Karpov-Kasparov Amsterdam 1988)

11.d5

(Karpov played 11.b3 here so we can safely assume this is better)

11...Bxc3 12.bxc3 Qxd5 13.Nd4 Qc4 14.Ba3

(14.Nxc6 bxc6 15.Qd4 is about equal as Black's extra doubled pawn does not count for much)

14...Bd7 15.Bf1 Qa4

(White must play an endgame a pawn down because 16.Qc1 Nc4 is even worse)

16.Qxa4 Nxa4 17.Rec1

(17.Bb5 Nxd4 18.Bxd7 Nf3+)

17...Ne5 18.Rab1 c5 19.f4

(19.Rxb7 cxd4 20.cxd4 Bc6 21.Rxc6 Nxc6 22.Bb5 Reb8 23.Rxb8+ Rxb8 24.Bxc6 Nc3 wins the a2 pawn and should win the game)

19...cxd4 20.fxe5 Bf5!! 21.cxd4

(21.Rxb7 d3! and the pawn wins material) 22.Bxe7 Reb8 23.Rxb8+ Rxb8 24.Ba3 Rd8! and d3-d2)

Bxb1 22.Rxb1 e6 23.Rxb7 Reb8 24.Re7 Nc3 25.Bd3 Nd5!

(Not 25...Nxa2 26.Be4)

26.Rd7 Nxe3 27.Be4 Rd8 28.Rd6 Nc4 0-1

A clever way to trap a queen.

A Kristofori -A Kislinsky

Ukrainian ChT Alushta

King's Indian efence

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.Nc3 0-0 5.e4 d6 6.Bf4 Nc6 7.d5 e5 8.Bg5 Ne7 9.Qd2 Kh8 10.h4 Nh5 11.g3 f6 12.Bh6? Bxh6 13.Qxh6

13...Nf4! 14.gxf4

(The witty 14.Ng5 fxg5 15.gxf4 gxf4 would have restricted White's losses to a pawn but now the queen is lost)

14...Ng8 15.Qxf8 Qxf8 16.Bh3 Bxh3 17.Rxh3 Qc8 18.Rh2 Qg4 19.Ke2 Qxf4 20.Rg1 Qh6 21.h5 g5 22.Nd1 Qf8 23.h6 c6

(Black opens up the game for his queen)

24.Ne3 Ne7 25.c5 cxd5 26.Nxd5 Nxd5 27.exd5 dxc5 0-1

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