Chess Openings

King's Pawn Game (e4)
  King's Pawn Game (e5)
    Bishop's Opening (Bc4 Nc3)
      Scholar's Mate (Qf3)
      Scholar's Mate (Qh5)
    King's Knight Opening (Nf3)
      Normal Variation (Nc3)
        Ruy Lopez (Bb6)
          Morphy Defense (a6)
            Exchange Variation (Bxc6)
            Caro Variation (Ba4 b5 Bb3)
          Berlin Defense (Nf6 O-O)
        Italian Game (Bc4)
          Two Knight's Defense (Nf6)
        Petrov's Defense (Russian Game) (Nf3)
      Philidor Defense (d6 Bc4/d3)
  Sicilian Defense (c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3)
    Najdorf (a6)
    Dragon (g6)
    Scheveningen (e6)
  Pirc Defense (d6)
    Czech Defense (d4 Nf6 Nc3 c6)
  Danish Gambit (d4 exd4 c3)
    Danish Gambit Accepted (dxc3)
    Danish Gambit Declined (d5)
Queen's Pawn Game (d4)
  Englund's Gambit (e5)
    Englund's Gambit Accepted (dxe5)
    Englund's Gambit Declined (d5)
  Queen's Pawn Game (d5)
    Queen's Gambit (c6)
      Queen's Gambit Accepted (dxc4)
      Queen's Gambit Declined (e6)
    Accellerated London System (Bf4)