Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Smith-Morra_Gambit
Moves: 1. e4 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qa4 e5 5. f3 Nf6 6. Nh3 b6 7. Bg5 h6 8. Bh4
Bb7 9. Bb5 Bc5 10. Nc3 O-O 11. Nd5 Be7 12. O-O-O Nxd5 13. Bxe7 *
Position (FEN): r2q1rk1/pb1pBpp1/1pn4p/1B1np3/Q3P3/5P1N/PPP3PP/2KR3R b - - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1503
Best move: Ndxe7