Chess Board
[ECO code C23]
(CLASSICAL) BISHOP'S OPG. - Philidor Var.
Lewis Counter-Gambit
White's QBPawn on QB3(c3) moves to QB4(c4), defends his doubled QPawn and enables Kt-QB3.
Black pushes his own QBPawn out to QB3(c6), set to take White's centre QP with a good game.
    White  Black	White  Black
 1. P-K4   P-K4	     6.	BxB    QxB
 2. B-B4   B-B4	     7.	P-QB4  P-B3!
 3. P-QB3  P-Q4
 4. PxP?!  Kt-KB3
 5. B-Kt5 ch B-Q2
Example ends: Undo or Jump or Clear