[ECO code C21]
The Lanc-Arnold Gambit
White pushes his Queen's Bishop's Pawn out to attack Black's doubled QP, playing a rare gambit intended to pull Black further off-centre. W-Alt.
White Black 1. P-K4 P-K4 2. P-Q4 PxP 3. Kt-KB3 B-B4 4. P-B3
Example ends: Undo or Jump or Clear