Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Smith-Morra_Gambit
Moves: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Bc4 Nc6 5. Nf3 e6 6. Nxc3 g6 7. Bf4 Bg7 8.
Nb5 Qa5+ 9. Bd2 Qd8 10. Nd6+ Ke7 11. Nb5 Qb6 12. Qb3 a6 *
Position (FEN): r1b3nr/1p1pkpbp/pqn1p1p1/1N6/2B1P3/1Q3N2/PP1B1PPP/R3K2R w KQ - 0 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1913
Best move: Qa3+