Chess Board
[ECO code C42]
PETROFF'S DEFENCE - Marshall Trap
White's Queen on K2(e2) removes Black's knight on Q3(d3), losing a tempo but breaking the Kt-pin.
Black's Kt5(g4) Bishop takes the KB6(f3) Kt, and a 14..Q-R5+ch fork deters 14.QxB. Strong advantage.
    White  Black     7.	0-0    B-KKt5
 1. P-K4   P-K4	     8.	P-B4   0-0
 2. Kt-KB3 Kt-KB3    9.	PxP    P-KB4
 3. KtxP   P-Q3	    10.	R-K1?? BxP ch!
 4. Kt-KB3 KtxP	    11.	KxB    KtxP
 5. P-Q4   P-Q4	    12.	Q-K2   KtxB
 6. B-Q3   B-Q3	    13.	QxKt   BxKt
Example ends: Undo or Jump or Clear