Chess Board
[ECO code C23]
BISHOP'S OPENING - Classical Var.
The Petroff Gambit

Black developed his queen to K2(e7) (sometimes called the queen's natural defensive square).
White advances his Queen's Pawn to the centre to threaten Black's K4Pawn.
	White	Black
 1.	P-K4	P-K4
 2.	B-B4	B-B4
 3.	Kt-KB3	P-Q3
 4.	P-B3	Q-K2
 5.	P-Q4

Example ends: Undo or Jump or Clear