Chess Board
[ECO code C65]
RUY LOPEZ - Berlin Defence
Side Variation
Black's combination of KKt and QRP (causing a piece exchange on QB3/c6) left his KP undefended.
White's KB3(f3) Knight removes the pawn on K5(e5), and Black dare not retake the lost P (now or after 6..Q-Q5, 7.Kt-KB3) because of a R-K1 threat.
    White  Black	White  Black
 1. P-K4   P-K4	     5. BxKt   QPxB
 2. Kt-KB3 Kt-QB3    6. KtxP
 3. B-Kt5  Kt-B3
 4. 0-0    P-QR3?!
Example ends: Undo or Jump or Clear