[ECO code B11]
Lutikov Variation
Black develops his King's Kt to KB3(f6) to shield his weak KBP and threaten White's KP, despite a likely 5.P-K5 in reply.
White Black 1. P-K4 P-QB3 2. Kt-QB3 P-Q4 3. Q-B3 P-Q5 4. B-B4 Kt-KB3
Example ends: Undo or Jump or Clear