Chess Board
[ECO code A82]
STAUNTON GAMBIT
"Blackmar Second Gambit"

White's KBPawn on KB3(f3) removes Black's doubled KP on K4(e4) and attacks his QPawn.
Black's QPawn exchanges, accepting doubled IQPs (isolated QPs). Often continues 6.B-QB4..B-B4.
     White   Black
 1.  P-Q4    P-KB4
 2.  P-K4    PxP
 3.  Kt-QB3  Kt-KB3
 4.  P-B3    P-Q4
 5.  PxP     PxP

Example ends: Undo or Jump or Clear