Kasparov grooming for his September rematch with Karpov. Challenger for world championship takes on some sparring partners

While lesser mortals toil in the Interzonals for a spot in the candidates' matches, world championship challenger Gary Kasparov has been preparing himself for his return match with world champion Anatoly Karpov, scheduled to begin Sept. 2 in Moscow. In a recent training match held in Hamburg, Kasparov, the 22-year-old Soviet grandmaster, easily disposed of West German grandmaster Robert H"ubner, the 11th-ranked player in the world, by a 41/2-11/2 margin. Kasparov played incisively to win Games 1, 2, and 4, while drawing the others. After his victory the challenger gave an inflammatory interview published in Der Spiegel, the German magazine that sponsored the match. In the interview Kasparov criticized International Chess Federation and Soviet Chess Federation officials as well as the rules that will govern the September match. While he expressed confidence in his chances in the rematch, he expressed doubts that Kasparov would play, saying that Karpov's character defects might prevent him from contesting the match.

Kasparov also intends to play one more training match in Belgrade, against a world-class Swedish GM, Ulf Andersson. Today's game is the first in the six-game H"ubner match. It shows Kasparov at his best in a witty tactical melee. English Opening H"ubner Kasparov H"ubner Kasparov H"ubner Kasparov H"ubner Kasparov H"ubner Kasparov H"ubner Kasparov

1. P-Q-B4 P-K4

2. N-QB3 P-Q3

3. P-Q4 (a) PxP

4. QxP N-KB3

5. P-KN3 (b) N-B3

6. Q-Q2 B-K3

7. N-Q5 (c) N-K4

8. P-N3 N-K5

9. Q-K3 N-B4 (d) 10. B-QN2 (e) P-QB3 11. N-B4 (f) N-N5 (g) 12. Q-Q4 N-K5 (h) 13. B-KR3 (i) Q-R4 ch 14. K-B1 N(N)xP 15. BxB PxB 16. NxP K-Q2 17. N-R3 NxN 18. QxN R-K1 19. N-B5 ch (j) QxN 20. Q-N4 ch K-B2 21. QxN B-K2 22. BxP (k) KR-B1 ch 23. BxR RxB ch 24. K-K1 Q-B7 ch 25. K-Q1 Q-Q5 ch 26. K-B2 Q-K5 ch 27. K-Q2 B-N4 ch 28. K-B3 Q-K4 ch 29. Resigns (l)

A. The most forthright reply. White obtains a spatial advantage at the cost of time and development, as his queen will be the subject of harassment by the Black steeds.

B. Here 5. P-K4 would have been more consistent and safer, avoiding the ensuing complications.

C. Not 7. P-N3, P-Q4!, which favors Black, but White might yet have tried 7. P-K4.

D. Up to here all book. The text improves on 9. . . . P-QB3; 10. QxN, PxN; 11. PxP, Q-R4 ch; 12. B-Q2, BxP; 13. Q-KB4, when White stands well.

E. Wrong bishop. 10. B-KN2 would guard White's K4 square.

F. Here 11. N-B3 was absolutely necessary to prevent the further incursion of Black's knights.

G. Along with his next move, Black is already winning. Now 12. NxB, NxQ; 13. NxQ, N-B7 ch costs White the exchange and the game.

H. A real sockdolager -- as effective as it is surprising. Now 13. QxN, Q-R4 ch; 14. K-Q1, NxP ch costs White his queen.

I. Probably the best try. The obvious 13. N(N)R3 is neatly demolished by 13. . . . Q-R4 ch; 14. K-Q1, N(K)xP ch; 15. NxN, P-QB4, and the White queen can no longer protect KB2.

J. Resourceful but unavailing. Since 19. Q-N4, RxN; 20. QxN, Q-Q7 is lethal, White first deflects the Black queen.

K. We now see that the Black queen is still well positioned. What follows now is an attractive King hunt.

L. Since 29. K-B2, QxP ch; 30. K-N1 (30. K-B3, Q-Q7 mate), R-B7; 31. QxP ch, K-N3, and White is unable to avoid mate; and 29. K-N4, P-R4 ch; 30. K-R3 or 32. K-R4, B-B3, and the harassed White monarch will be unable to avoid mate.

International Grandmaster Arthur Bisguier is a former US champion and has won or shared the US Open title five times.