Chess Board
[ECO code D22]
QUEEN'S GAMBIT ACCEPTED
The Borisenko-Furman Variation
Black's solid but less popular pawn to QR3(a6) deterred 4.Q-R4+ch, as enabling 4..P-QKt4 to repel.
White's King's Pawn advances to K4(e4), "a sharp line ... introduced in Borisenko-Furman, USSR Championship 1950" (Oxford Companion). W-Alt.
	White	Black
 1.	P-Q4	P-Q4
 2.	P-QB4	PxP
 3.	Kt-KB3	P-QR3
 4.	P-K4
Example ends: Undo or Jump or Clear