Caro-Kann Defense: Alien Gambit

The Caro-Kann Defense: Alien Gambit is a chess opening classified under ECO code B15 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 6 moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng5 h6 6. Nxf7. The resulting position leaves black to move.