Blackmar-Diemer Gambit is a chess opening with the ECO code D00. It goes 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6. White opens with 1. d4 (the queen's pawn) and Black answers 1... d5. After 6 moves it is White to move. After the last move Black is a pawn ahead in material. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. d4 – White plays the pawn to d4
1... d5 – Black plays the pawn to d5
2. e4 – White plays the pawn to e4
2... dxe4 – Black captures on e4 with the d-pawn
3. Nc3 – White plays the knight to c3
3... Nf6 – Black plays the knight to f6
About the Blackmar-Diemer Gambit
White plays 1.d4 d5 2.e4, offering a pawn for quick development and attack. It is a sharp, risky gambit loved by club players.
The main idea is Nc3 and f3 to open the f-file.
White aims Bd3, Qe1-h4 and Bg5 at Black's king.
Black can return the pawn or keep it and defend calmly.