Chess puzzle (Advantage)
Opening: Modern_Defense, Modern_Defense_Other_variations
Moves: 1. d4 g6 2. c4 Bg7 3. e3 b6 4. Bd3 Bb7 5. Nf3 e6 6. O-O Ne7 7. e4 O-O 8. d5 e5
9. Nc3 d6 10. a3 c6 11. Bd2 cxd5 12. cxd5 Nd7 13. Nb5 Nc5 14. Bc2 Ba6 15. a4
Nxa4 *
Position (FEN): r2q1rk1/p3npbp/bp1p2p1/1N1Pp3/n3P3/5N2/1PBB1PPP/R2Q1RK1 w - - 0 16
White to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1103
Best move: Bxa4