D00: Blackmar-Diemer, Lemberg counter-gambit

D00 Sub-variants:

• Queen's pawn game
  1. d4 d5
• Queen's pawn, Mason variation
  1. d4 d5 2. Bf4
• Queen's pawn, Mason variation, Steinitz counter-gambit
  1. d4 d5 2. Bf4 c5
• Levitsky attack (Queen's bishop attack)
  1. d4 d5 2. Bg5
• Blackmar gambit
  1. d4 d5 2. e4
• Queen's pawn, stonewall attack
  1. d4 d5 2. e3 Nf6 3. Bd3
• Queen's pawn, Chigorin variation
  1. d4 d5 2. Nc3
• Queen's pawn, Anti-Veresov
  1. d4 d5 2. Nc3 Bg4
• Blackmar-Diemer gambit
  1. d4 d5 2. Nc3 Nf6 3. e4
• Blackmar-Diemer, Euwe defence
  1. d4 d5 2. Nc3 Nf6 3. e4 dxe4 4. f3 exf3 5. Nxf3 e6
• Blackmar-Diemer, Lemberg counter-gambit
  1. d4 d5 2. Nc3 Nf6 3. e4 e5