Chess Board
[ECO code C07]
FRENCH DEFENCE - Open Tarrasch Var.
Side Variation
White's Q4(d4) Pawn removes the QBP on QB5(c5) and invites exchange to force open the Q-file.
Black's Q2(d7) Knight (best) removes the newly doubled QBP, but 7.QxQ+ch..KxQ, 8.B-Kt5+ch..P-B3, 9.0-0-0+ch.. creates an advantageous White attack.
    White  Black	White  Black
 1. P-K4   P-K3	     5. KtxP   Kt-Q2?!
 2. P-Q4   P-Q4	     6.	PxP!   KtxP
 3. Kt-Q2  P-QB4
 4. KKt-B3 QPxP
Example ends: Undo or Jump or Clear