Alekhine's Defence – Brooklyn Defence arises after 1.e4 Nf6 2.e5 Ng8. ECO code: B02.

Black retreats the knight to its starting square after provoking e5. This bizarre-looking move wastes two tempi but establishes a structure similar to the French Defence or Caro-Kann Defence with an advanced white pawn on e5. The defence is considered dubious but has some transpositional logic for players who prefer specific French-type structures.