Chess puzzle (Advantage)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_French_Connection
Moves: 1. e4 e6 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 d5 5. exd5 exd5 6. Nxd5 Nxd5 7. Qh5 Be6 8.
f4 g6 9. Qf3 f5 10. Nh3 Bh6 11. g3 Qd6 12. Ng5 Bxg5 13. fxg5 O-O-O 14. Bd2 a6
15. O-O-O Na5 *
Position (FEN): 2kr3r/1pp4p/p2qb1p1/n2n1pP1/2B5/3P1QP1/PPPB3P/2KR3R w - - 2 16
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1645
Best move: Bxa5