Chess puzzle (Advantage)
Opening: Alekhine_Defense, Alekhine_Defense_Maroczy_Variation
Moves: 1. e4 Nf6 2. d3 d5 3. Nd2 e6 4. Ngf3 Bb4 5. a3 dxe4 6. dxe4 Nxe4 *
Position (FEN): rnbqk2r/ppp2ppp/4p3/8/1b2n3/P4N2/1PPN1PPP/R1BQKB1R w KQkq - 0 7
White to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1623
Best move: axb4