Chess Board
[ECO code C67]
RUY LOPEZ - Open Berlin Def.
Side Variation
White's Q4(d4) Knight captures the undefended Black pawn on QB6(c6) and attacks his queen.
Black deploys his King's Bishop to QB4(c5) with check for 12.K-R1..QxQ, 13.RxQ..0-0, but White (with a lead worth two pawns) has the advantage.
    White  Black     6.	R-K1   P-Q4
 1. P-K4   P-K4	     7.	KtxP   P-QR3?!
 2. Kt-KB3 Kt-QB3    8.	BxKt ch PxB
 3. B-Kt5  Kt-B3     9.	P-KB3  P-KB4
 4. 0-0	   KtxP	    10.	PxP    QPxP
 5. P-Q4   PxP?!    11.	KtxP   B-B4 ch
Example ends: Undo or Jump or Clear