Chess Board
[ECO code C65]
RUY LOPEZ - Berlin Def.
Mortimer Trap
White withdraws his long-threatened light Bishop from QKt5(b5) to QR4(a4), its only flight square.
Black's Queen's Knight's Pawn advance forks White's bishop and knight, and Black will gain a piece for advantage.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	KtxP?? P-B3
 2. Kt-KB3 Kt-QB3    6.	Kt-B4  P-Q3
 3. B-Kt5  Kt-B3     7.	B-R4   P-Kt4
 4. P-Q3   Kt-K2?!
Example ends: Undo or Jump or Clear