Alekhine Defense: Brooklyn Variation, Everglades Variation

The Alekhine Defense: Brooklyn Variation, Everglades Variation is a chess opening classified under ECO code B02 in the Semi-Open Games family, where Black responds to 1.e4 with something other than 1...e5, including the Sicilian Defense, Caro-Kann, and Pirc. It is reached after 3 moves: 1. e4 Nf6 2. e5 Ng8 3. d4 f5. The resulting position leaves white to move.