Chess Board
[ECO code D28]
QUEEN'S GAMBIT ACC. - Classical Var.
The Flohr Variation

White's Q4(d4) Pawn to Q5(d5) prevents 13..BxKt and challenges Black's KP for 13..PxP, 14.P-K4!.
Black develops Queen to QB2(c7), with equality.
    White  Black     7.	Q-K2   Kt-B3
 1. P-Q4   P-Q4	     8.	R-Q1   P-QKt4
 2. P-QB4  PxP	     9.	B-Kt3  P-B5
 3. Kt-KB3 Kt-KB3   10.	B-B2   Kt-QKt5
 4. P-K3   P-K3	    11.	Kt-B3  KtxB
 5. BxP	   P-B4!    12.	QxKt   B-Kt2
 6. 0-0    P-QR3    13.	P-Q5   Q-B2

Example ends: Undo or Jump or Clear