Irregular chess openings Irregular openings are 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 Desprez Opening 1 . h4 Dunst Opening 1.Nc3 Durkin Opening ( also known as 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 These openings are all categorized under the ECO code A00 . The only other possible openings are 1.e4 ( King 's Pawn Game ) , 1.d4 ( Queen 's Pawn Game ) , 1.c4 ( English Opening ) , 1.Nf3 ( Réti Opening ) , 1.f4 ( Bird 's Opening ) , and 1.b3 ( Larsen 's Opening ) . Note that if White plays a regular opening and Black responds in an unconventional way , the opening is not categorized A00 . For instance , 1.e4 a6 is classified as 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 Categories : Chess openings In other languages : Italiano | Polski Schiller , Eric Unorthodox Chess Openings Cardoza 2003 ISBN 1-5804-2072-9 