Chess puzzle (Advantage)
Opening: Scotch_Game, Scotch_Game_Other_variations
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Ne5 5. Nc3 Bb4 6. a3 Nf6 *
Position (FEN): r1bqk2r/pppp1ppp/5n2/4n3/1b1NP3/P1N5/1PP2PPP/R1BQKB1R w KQkq - 1 7
White to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1160
Best move: axb4