Blackmar-Diemer Gambit Declined
What is the Blackmar-Diemer Gambit Declined?
The Blackmar-Diemer Gambit Declined is a chess opening that begins with 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c5. It is classified under ECO D00 and has 9 named variations. Black chooses it with the move c5.
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c5
ECO: D00
Chosen by: Black
Main variations
1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e5
1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 a6
1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Nc6
1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e3
1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c6
1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Bf5
All 9 variations
| ECO | Variation | Moves |
|---|---|---|
| D00 | Brombacher Countergambit | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c5 |
| D00 | Elbert Countergambit | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e5 |
| D00 | Gedult Defense | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 a6 |
| D00 | Lamb Defense | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Nc6 |
| D00 | Langeheinicke Defense | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e3 |
| D00 | O'Kelly Defense | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c6 |
| D00 | Vienna Defense | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Bf5 |
| D00 | Weinsbach Defense | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e6 |
| D00 | Weinsbach Defense, Pfrang Gambit | 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e6 5. fxe4 |
How to learn an opening
Learn the ideas before the moves: where the pieces go, which pawn breaks matter and what the typical middlegame plans are. Then play it, and after each game look up the point where you or your opponent left the known moves. MentoChess shows that point automatically for every game you import.
Opening lessons: Three golden opening rules · Scholar’s mate and how to stop it · Italian Game: plans, not just moves · Answering 1.d4: the Queen’s Gambit Declined · Meeting the Sicilian with 2.c3 · From moves to structures