Chess Board
[ECO code C42] Move Move Here
PETROFF'S DEFENCE - Marshall Attack
The Marshall Trap

Black's KBP to KB4(f5) supported his Kt and B.
White moves his King's Rook to K1(e1) - halving the defence of his KBP - to his cost, falling into a trap. [10.Kt-B3 is correct]. W-Alt.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	B-Q3   B-Q3
 2. Kt-KB3 Kt-KB3    7.	0-0    B-KKt5
 3. KtxP   P-Q3	     8.	P-B4   0-0
 4. Kt-KB3 KtxP	     9.	PxP    P-KB4
 5. P-Q4   P-Q4	    10.	R-K1??

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