A00 is the Encyclopaedia of Chess Openings designator for unconventional chess openings with an unusual first move from White. Such openings include: The Encyclopaedia of Chess Openings (ECO) is a book collection (now also a computer database) describing chess openings. ... The first moves of a chess game are the opening moves, collectively referred to as the opening. ...

• 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
• Desprez Opening 1.h4
• Dunst Opening 1.Nc3
• Durkin Opening (also known as Durkin's Attack) 1.Na3
• Grob's Attack (also known as Spike Opening) 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 Game 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). Anderssens Opening is a chess opening defined by the opening move 1. ... A00 is the Encyclopaedia of Chess Openings designator for unconventional chess openings with an unusual first move from White. ... Barnes Opening (also called Gedults Opening) is a chess opening where White opens with 1. ... Benkos Opening is a chess opening is characterized by the move 1. ... A00 is the Encyclopaedia of Chess Openings designator for unconventional chess openings with an unusual first move from White. ... The Desprez Opening is a chess opening characterized by the opening move (in algebraic notation) 1. ... The Dunst Opening is a chess opening where White opens with the move 1. ... The Durkin Opening is a very rarely played chess opening beginning with the move (in algebraic notation): 1. ... Grobs Attack, also known as the Spike, is an unconventional (ECO code A00) chess opening where White immediately moves the king knights pawn two squares ahead: 1. ... The Mieses Opening is a chess opening characterized by the opening move 1. ... A00 is the Encyclopaedia of Chess Openings designator for unconventional chess openings with an unusual first move from White. ... The Sokolsky Opening (also called the Orangutan or Polish opening) is an uncommon chess opening in which white opens with 1. ... A00 is the Encyclopaedia of Chess Openings designator for unconventional chess openings with an unusual first move from White. ... The Ware Opening is an uncommon chess opening in which White opens with 1. ... The term Kings Pawn Game refers to any chess opening where White opens with 1. ...

References

Because these openings are not popular with elite chess players, the standard opening references (see chess opening) do not cover them in detail. The first moves of a chess game are the opening moves, collectively referred to as the opening. ...

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

External links

• Unusual Openings