Chess Board
[ECO code B06]
The Rossolimo Variation

White developed his king's knight to KB3(f3) to double the contest for Black's K4(e5).
Black develops his Queen's Bishop to KKt5(g4) and pins White's KKt to its queen (preventing support for 5.P-K5).
	White	Black
 1.	P-K4	P-KKt3
 2.	P-Q4	B-Kt2
 3.	P-QB4	P-Q3
 4.	Kt-KB3	B-Kt5!?

Example ends: Undo or Jump or Clear