Chess Board
[ECO code C42]
PETROFF DEFENCE
Cochrane Gambit
White develops his King's Bishop to QB4(c4) with check, and enables castling.
Black develops a counter Queen's Bishop on K3(e6) ending check, but can have a difficult game.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	Kt-QB3 Q-K1
 2. Kt-KB3 Kt-KB3    7.	B-B4 ch B-Q3
 3. KtxP   P-Q3
 4. KtxP!? KxKt
 5. P-Q4   P-KKt3
Example ends: Undo or Jump or Clear