A00

A00 is the Encyclopaedia of Chess Openings designator for unconventional chess openings with an unusual first move from White. Such openings include:

• Anderssen's Opening 1.a3
• Amar Opening (also known as Paris Opening) 1.Nh3
• Barnes Opening (also known as Gedult's Opening) 1.f3
• Benko's Opening 1.g3
• Clemenz Opening 1.h3
• Deprèz Opening 1.h4
• Dunst Opening 1.Nc3
• Durkin's Attack 1.Na3
• Grob's Attack 1.g4
• Mieses Opening 1.d3
• Saragossa Opening 1.c3
• Sokolsky Opening (also known as Polish or Orangutan Opening) 1.b4
• Van't Kruijs Opening 1.e3
• Ware Opening 1.a4

Note that if white plays a regular opening, like the King's Pawn Opening and black responds in some unconventional way, the opening is not categorized under the ECO code A00. For instance 1.e4 a6 is classified under B00 (King's Pawn Opening).

References

Because these openings are not popular with elite chess players, the standard opening references (see chess opening) do not cover them in detail.

• Schiller, Eric (2003). Unorthodox Chess Openings. Cardoza. ISBN 1–5804–2072–9.

External links

• Unusual Openings