Chess is a scientific game and its literature ought to be placed on the basis of the strictest truthfulness, which is the foundation of all scientific research. — W._Steinitz

C20

1.e4 e5	King's Pawn:
2.a3	King's Pawn: Mengarini
2.Qf3	King's Pawn: Napoleon
2.Bb5	King's Pawn: Portuguese
2.Bd3	King's Pawn: Tortise
2.Qh5	King's Pawn: Wayward Queen
2.Qh5 Nc6 3.Bc4 Nh6 4.d3 g6 5.Qf3 f6 6.Ne2 d5	King's Pawn: Wayward Queen (Mellon)
2.f3	King's Pawn: King's Head
2.f3 Nf6	King's Pawn: King's Head (Walkerling)
2.d3	King's Pawn: Indian
2.d3 f5	King's Pawn: Indian Gambit
2.c3	King's Pawn: MacLeod
2.c4	King's Pawn: Whale
2.Ne2	King's Pawn: Alapin