Chess Board
[ECO code D35]
QUEEN'S GAMBIT - Exchange Variation
White develops King's Bishop to Q3(d3) resuming K4(e4) control, and enables castling on either wing.
Black's KB1(f8) Knight to K3(e6) in attack blocks his QB. Continue 10.BxKt or else 10.B-R4..P-KKt3 set for 11.0-0..0-0 or 11.0-0-0..Kt-Kt2, with equality.
    White  Black	White  Black
 1. P-Q4   P-Q4	     6.	Kt-B3  B-K2
 2. P-QB4  P-K3	     7.	P-K3   P-B3
 3. Kt-QB3 Kt-KB3    8.	Q-B2   Kt-B1
 4. PxP    PxP	     9.	B-Q3   Kt-K3
 5. B-Kt5  QKt-Q2
Example ends: Undo or Jump or Clear