Blackmar–Diemer Gambit (D00)

The Blackmar–Diemer Gambit (or BDG) is a chess opening characterized by the moves: 1. d4 d5 2. e4 dxe4 3. Nc3 White intends to follow up with f2–f3, usually on the fourth move. White obtains a move and a half-open f-file in return for a pawn, and as with most...