Chess Board
[ECO code E11]
BOGOLJUBOW DEFENCE
Exchange Variation
White deployed his QKt to QB3(c3), enabling 0-0-0.
Black develops his Queen's Knight to Q2(d7) reserving ..P-QB3(c6) or ..P-QB4(c5), with equal chances. B-Alt.
    White  Black	White  Black
 1. P-Q4   Kt-KB3    6.	P-K3   0-0
 2. P-QB4  P-K3	     7.	Kt-B3  QKt-Q2
 3. Kt-KB3 B-Kt5 ch
 4. B-Q2   BxB ch
 5. QxB	   P-Q4
Example ends: Undo or Jump or Clear