24P-N6 16 R-Ql 15 RH; Or 24 . . . R-Bl 25 B-N5 N-B426R-N1±.

PK: Black prevents the manoeuvre 25 N-N5 on which would follow 25 . . . NxKP!

26 Q-K3 1 Q-Rl? 18 RH: I should have played 26 . . .

27 Q B2 8 B QR3 3 PK: An interesting continuation was 27 . . . N-Nl!? with the threat of 28 . . . N-B3.

PK: The critical moment of the struggle. How to take on QN5? The answer to that question demanded great expenditure of energy and time, but that is just exactly what both players no longer had too much of. Karpov decided to exchange rooks, in order to reduce the pressure against his KP, but, all the same, 29 NxB was stronger. After that 29 . . . R-R7 would be bad because of 30P-N7!

Also after 29 . . . Q-Q4 30 N-Q6 R-R7 (30 . . . NxKP is bad: 31 BxN BxB 32 QxP+ K-Rl 33 N-K8. Hiibner, in Informator 15, also mentions 30 . . . R-KB1 31 P-N7±±.) 31 QxP+ K-Rl 32 B-N2 White has the better prospects, for example:

(a) 32 . . .NxKP 33 Q-K7! QxN 34 QxQ RxQ 35 BxN BxB 36 RxB R-Rl 37 P-N7 R-QN1 38 R-QB5 R3-Q1 39 R-B7 with R-KB1-B7 to follow;

PK: A tactical blow, saving Black. 32 BxN 12

Not 32 N-N7? on account of 32 ... N-B6+! (but not 32 . .. N-N5? 33 NxQ BxB 34 QxB RxQ 35 R-N1±± - Hübner) 33 PxN Q-KN4+ 34 K-Rl BxB 35 Q-B2 R-Q4 and Black wins.

33 BxB 1

White has a lot of promising looking moves, but none of them work:

(cl) Kondratiev gives 33 . . . R-Ql and 34 P-N8=Q is no good because of 34 ... RxQ 35 BxR B-Q5 -this is where the weakness of White's back rank becomes apparent after the exchange of rooks on move 29. (c2) Hübner, however, chooses 33 . . . R-N3! with the same idea as in cl, while after 34 R-Rl there would follow 34 ... BxB 35 RxQ R-N8 + 36 Q-Bl B-Q5+ 37 K-Rl RxQ mate.

36P-N7 0 R-Nl?! 1 RH: More accurate is 36 . . . Q-QB4 + 37 K-Rl R-Nl and then 38 R-QB1? allows 38 . . . RxP, or 38 R-Rl Q-B3. 37QtQB2 1 Of course not 37 R-Rl? RxP.

After 41 ... K-N2 42 Q x R Black has a perpetual with 42 . .. Q-Q5 + 43 K-Bl Q xR+ 44 K-B2 Q-Q5 +. 2.37 - 2.27.

2703 Vladimir Tukmakov-AK:

Ruy Lopez

1 P-K4 P-K4 2 N-KB3 N-QB3 3 B-N5 P-QR3 4 B-R4 N-B3 5 0-0 B-K2 6 R-Kl P-QN4 7 B-N3 P-Q3 8 P-B3 1 0-0 9 P-KR3 N-Nl

10 P-Q4 2 N1-Q2 3 11 P-B4 4 This plan in the Breyer variation is seen much less than the usual 11 QN-Q2.

This move turns out to be rather harmless. The tried path is 12 P-B5 Q-B2 13 BPxP BxP 14 B-N5 PxP 15BxNPxB 16NxPor 16 QxP.

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