RBl

Opting for the closed form of this opening. It has now been established that the more aggressive 10 Q-B2 should lead nowhere, although, ironically, Ciric lost a brilliant game as Black in this line to Geller before Black's defence had been properly elaborated: Geller-Ciric, Oberhausen, 1961, went 10 Q-B2 R-Bl 11 QR-Q1 Q-B2 12 P-K4 PXKP 13 NXP NXN 14 QXN P-QB4 15 P-Q5 N-B3 (15 ... B-KB3! 16 Q-B2 PXP 17 PXP BXB 18 QXB QR-Q1 19 P-Q6 Q-Nl 20 KR-K1 N-B3 21 R-K7 RXP! 22 RXR QXR 23 RXB Q-Q8+, as in Geller-Ney, Tiflis, 1967, gives equality) 16 Q-B2 PXP 17 B-K5! Q-Ql 18 N-N5 P-N3 19 P-KR4 N-R4 20 BXP BXB 21 RXB Q-Kl 22 R-Kl Q-B3 23 B-N2 KR-K1 24 NXRP! BXP 25 KR-Q1 Q-K3 26 Q-B3 P-B3 27 Q-Q3 Q-N5 28 R-N5!! Q-K5 29 NXP+ NXN 30 PXB KR-Q1 31 QXR+ RXQ 32 RXR+ K-B2 33 BXN KXB 34 R-Q6+ K-B2 35 R(Q6)XKNP QXRP 36 R-K7+ K-B3! 37 R(N7)-N6+ K-B2 38 R-N7+ K-B3 39 R(N7)-N6+ K-B2 40 R-N4 Q-R4 41 R-N7+ K-B3 42 R(N4)-N6+ K-B4 43 R-N5+ Resigns.

This does not work out very well. Superior is 13 ... KPXP, although this type of position has been known to guarantee White a prolonged initiative

11P-K3 12Q-K2 13BPXP

124 The Chess Combination from Philidor to Karpov since the game Botvinnik-Petrosian, Spartakiad, 1964; the pawn at Q4 slightly restricts the scope of Black's QB and White gains useful squares for manoeuvres—especially K5.

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