Chess Board
[ECO code C66]
RUY LOPEZ - Closed Berlin Defence
Side Variation
White's Q5(d5) Pawn removes the pinned Black knight on QB6(c6) and invites exchange.
Black's K4(e5) Pawn on to K5(e4) forks White's B+KKt, but Nimzowitsch continued 9.R-K1..P-Q4, 10.B-K2!..PxKt, 11.PxP..BxP, 12.B-QKt5++mate!
    White  Black	White  Black
 1. P-K4   P-K4	     5. P-Q4   KtxP?!
 2. Kt-KB3 Kt-QB3    6.	P-Q5   P-QR3
 3. B-Kt5  Kt-B3     7.	B-Q3   Kt-B3
 4. 0-0    P-Q3	     8.	PxKt   P-K5
Example ends: Undo or Jump or Clear