C43: Petrov, modern attack, main line

C43 Sub-variants:

• Petrov, modern (Steinitz) attack
  1. e4 e5 2. Nf3 Nf6 3. d4
• Petrov, modern attack, main line
  1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4
• Petrov, modern attack, Steinitz variation
  1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2
• Petrov, modern attack, Bardeleben variation
  1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6
• Petrov, Urusov gambit
  1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. Bc4
• Petrov, modern attack, Symmetrical variation
  1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4
• Petrov, modern attack, Trifunovic variation
  1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Bd6 6. O-O O-O 7. c4 Bxe5