Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 Nc6 3. Nf3 e6 4. d4 cxd4 5. cxd4 d5 6. exd5 exd5 7. Nc3 Nf6 8.
Bb5 Bb4 9. Qe2+ Be6 10. Ng5 O-O 11. Nxe6 fxe6 12. Qxe6+ Kh8 13. O-O *
Position (FEN): r2q1r1k/pp4pp/2n1Qn2/1B1p4/1b1P4/2N5/PP3PPP/R1B2RK1 b - - 2 13
Black to move.
Themes:  Opening  
Puzzle rating: 1564
Best move: Nxd4