Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted

Black takes the e-pawn offered by 3. e4 and is a pawn up, with pawns on c5 and e4. White nearly always continues 4. d5, the idea behind the countergambit, gaining space and cramping Black's position in the manner of a reversed Albin Countergambit. The engine rates the position as roughly balanced. White scores well after 4. d5, while the rarer 4. dxc5 gives Black the better results. 4. Nc3 is another occasional choice.