Chess Board
[ECO code B93]
SICILIAN NAJDORF
6.f4 (Amsterdam?) Variation
White develops his Queen to KB3(f3) behind his KBP, doubling support for his KP+KBP.
Black develops his own Queen to QKt3(b6) and attacks White's Q-side knight for 8.Kt-Kt3 and an equal game.
    White  Black	White  Black
 1. P-K4   P-QB4     6.	P-B4   P-K3
 2. Kt-KB3 P-Q3	     7.	Q-B3   Q-Kt3
 3. P-Q4   PxP
 4. KtxP   Kt-KB3
 5. Kt-QB3 P-QR3
Example ends: Undo or Jump or Clear