Anatoly Karpov kept his hopes alive for a 50-50 cut of the $3 million World Chess Championship prize money Saturday by defeating Garry Kasparov, who has already won the title, in the 23rd game of their match.

Karpov, playing white, forced his fellow Soviet grandmaster to withdraw in the 29th move after 3 hours, 50 minutes of play. The pair play their 24th and final game Monday.Kasparov successfully defended his title for the second time by drawing Wednesday with Karpov. The 0.5 points awarded for the draw brought Kasparov's point total to 12 against 10 for Karpov.

The defending champion needed only 12 points to keep the title. But the final two games remain important for both men in terms of dividing up the prize money.

Karpov needed to win the the last two matches to come even with Kasparov and assure himself of an equal $1.5-million share.

Here are the moves from the 23rd game:Karpov Kasparov

White Black

1. d4 Nf6

2. c4 g6

3. Nc3 Bg7

4. e4 d6

5. f3 0-0

6. Be3 e5

7. d5 Nh5

8. Qd2 Qh4 check

9. g3 Qe7

10. 0-0-0 f5

11. exf5 gxf5

12. Nh3 Na6

13. Rg1 Nf6

14. Nf2 Kh8

15. Be2 Bd7

Karpov Kasparov

White Black

16. Bg5 Nc5

17. g4 e4

18. fxe4 fxe4

19. Be3 Na4

20. g5 Nxc3

21. bxc3 Ng8

22. Ng4 c5

23. dxc6 Bxc6

24. h4 d5

25. cxd5 Bxd5

26. Qxd5 Rac8

27. Qd6 Rxc3 check

28. Kb1 Qf7

29. Bd4 abandons