Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Accelerated_Dragon
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Nf3 Nf6 7. Bd3 O-O 8.
Bf4 d6 9. Qd2 e5 10. Bh6 Be6 11. O-O-O Qa5 12. Kb1 Nb4 13. b3 Nxa2 *
Position (FEN): r4rk1/pp3pbp/3pbnpB/q3p3/4P3/1PNB1N2/n1PQ1PPP/1K1R3R w - - 0 14
White to move.
Themes:  Middlegame  
Puzzle rating: 1356
Best move: Nxa2