Reigning champion Garry Kasparov and challenger Anatoly Karpov resume their duel for the world chess title this weekend, Karpov having won Game 17 to bring the score to a tie.

"I feel very confident now," Karpov said Wednesday after winning on the 40th move. "It was quite clear that he was not in good shape."The two Soviet grandmasters are now tied 8.5 points each with the next game scheduled for Saturday. A win counts for a point, a tie for a half point.

Kasparov had gone ahead Tuesday when he won the marathon 16th game after 102 moves played over four days. But Karpov, with the white pieces on Wednesday, evened the match.

The first player to gain 12.5 points wins the championship and $1.7 million of a $3 million purse. In the event of a tie, Kasparov retains the title. The first 12 games were played in New York.

After forcing Kasparov's resignation Wednesday, Karpov said, "It was a very complicated game, but I felt I always had the advantage."

Karpov Kasparov

White Black

1. d4 Nf6

2. c4 g6

3. Nc3 d5

4. cxd5 Nxd5

5. e4 Nxc3

6. bxc3 Bg7

7. Be3 c5

8. Qd2 0-0

9. Nf3 Bg4

10. Ng5 cxd4

11. cxd4 Nc6

12. h3 Bd7

13. Rb1 Rc8

14. Nf3 Na5

15. Bd3 Be6

16. 0-0 Bc4

17. Rfd1 b5

18. Bg5 a6

19. Rbc1 Bxd3

20. Rxc8 Qxc8

Karpov Kasparov

White Black

21. Qxd3 Re8

22. Rc1 Qb7

23. d5 Nc4

24. Nd2 Nxd2

25. Bxd2 Rc8

26. Rc6 Be5

27. Bc3 Bb8

28. Qd4 f6

29. Ba5 Bd6

30. Qc3 Re8

31. a3 Kg7

32. g3 Be5

33. Qc5 h5

34. Bc7 Ba1

35. Bf4 Qd7

36. Rc7 Qd8

37. d6 g5

38. d7 Rf8

39. Bd2 Be5

40. Rb7 Resigns