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1.d4 d5 2.Bf4 c5 3.e4 · ECO D00
Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit is a chess opening that arises after 1.d4 d5 2.Bf4 c5 3.e4. It is classified D00 in the ECO system, and the position after these moves has black to move.
This line is a variation within the Queen's Pawn Game family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.d4 d5 2.Bf4 c5 3.e4.
Each of these is a named opening reached by playing on from 1.d4 d5 2.Bf4 c5 3.e4. Open any of them to load the position on the board.