Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 e6 5. Bc4 Nb6 6. Bb3 d5 7. Nf3 Nc6 8. Bc2
Be7 9. Be3 cxd4 10. cxd4 O-O 11. Bd3 Nc4 12. Qc2 Nxe3 13. fxe3 h6 14. O-O Bd7
15. Qf2 Rc8 16. Qg3 *
Position (FEN): 2rq1rk1/pp1bbpp1/2n1p2p/3pP3/3P4/3BPNQ1/PP4PP/RN3RK1 b - - 5 16
Black to move.
Themes:  Opening  
Puzzle rating: 1609
Best move: Nb4