18 NOVEMBER 1966, Page 24

4

Kt-QB34 Kt-KB3 3 B- B Kt x PI This is well-known to give Black at 4... Kt - Q 3 sB-14 3 Kt - B 3 6 Kt- Kt s P- K Kt3 7 Q- B Kt - B 4? You really must know a variation of this kind if you intend to play it. Correct is 7 P - B 4;

8 Q-Q 5,Kt-B 3; 9 KtxPcti,K-Qx;roKtxR,P-Kt 3 and experience shows that Black's attack after B - Q Kt 2 is more than compensation for the sacrificed exchange.

8 Q - Q5 Kt - R 3 Now 8 . . . Q - K 2 or B 3; 9 Kt x Pch is much less favourable. 9 P - P - 3 • B x Q Kt4 B -Q K 3 zr Q - B 3 BxK B If ix 3xQ B then 12 P- Q s wins a piece.

• B xB B - R s

r3 B- Kt 7 R-KKtr

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