C31: King's Gambit Declined, Nimzovich counter-gambit

C31 Sub-variants:

• King's Gambit Declined, Falkbeer counter-gambit
  1. e4 e5 2. f4 d5
• King's Gambit Declined, Falkbeer, Tartakower variation
  1. e4 e5 2. f4 d5 3. Nf3
• King's Gambit Declined, Falkbeer, Milner-Barry variation
  1. e4 e5 2. f4 d5 3. Nc3
• King's Gambit Declined, Falkbeer counter-gambit
  1. e4 e5 2. f4 d5 3. exd5
• King's Gambit Declined, Nimzovich counter-gambit
  1. e4 e5 2. f4 d5 3. exd5 c6
• King's Gambit Declined, Falkbeer, 3...e4
  1. e4 e5 2. f4 d5 3. exd5 e4
• King's Gambit Declined, Falkbeer, Rubinstein variation
  1. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. Qe2
• King's Gambit Declined, Falkbeer, Nimzovich variation
  1. e4 e5 2. f4 d5 3. exd5 e4 4. Bb5+
• King's Gambit Declined, Falkbeer, 4.d3
  1. e4 e5 2. f4 d5 3. exd5 e4 4. d3
• King's Gambit Declined, Falkbeer, Morphy gambit
  1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nc3 Bb4 6. Bd2 e3