Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit

1.d4 d5 2.Bf4 c5 3.e4

ECO D00

The Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit is a chess opening line in the Queen's Pawn Game complex, reached after 1.d4 d5 2.Bf4 c5 3.e4.

It is catalogued under code D00 in the Encyclopaedia of Chess Openings (ECO).

The defining move e4 is chosen by White on move 3.

Do you want to learn openings?

Start with a GM-authored repertoire you study move by move, then practice against a human-like AI opponent:

• Catalan Opening
• King's Indian Defense with ...e5

Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.