At the halfway point of the Linares tournament, with each contestant having played one game against each of the others, the leader is the Latvian- born grandmaster Alexei Shirov, who is now resident in Spain. Full scores: Shirov 4; Kasparov, Anand and Kramnik 31/2; Svidler and Topalov 21/2; Ivanchuk 11/2.

Shirov took the lead with this fine win in round six. The final attack is impressive. 26...fxe6 loses to 27.Qg5 while at the end, 28...Kh7 (to stop Qxg6+) allows 29.Bxf7.

White: Alexei Shirov

Black: Peter Svidler

1 e4 c5 15 g3 0-0

2 Nf3 d6 16 Bh3 Ra8

3 d4 cxd4 17 Rhe1 a5

4 Nxd4 Nf6 18 a4 Qc7

5 Nc3 a6 19 Bf1 Rfc8

6 Be3 e5 20 Bb5 Bf8

7 Nb3 Be6 21 f4 exf4

8 Qd2 Nbd7 22 gxf4 Qb6

9 f3 h5 23 Re2 Ne8

10 0-0-0 Rc8 24 f5 Nc7

11 Kb1 Be7 25 f6 g6

12 Nd5 Bxd5 26 Bd7 Rd8

13 exd5 Nb6 27 Be6 Re8

14 Bxb6 Qxb6 28 Qg5 resigns