Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Old_Sicilian
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bc4 e6 4. O-O Be7 5. Nc3 Nf6 6. a3 d6 7. Re1 O-O 8. d3
a6 9. h3 b5 10. Ba2 Bb7 11. Be3 Rc8 12. Qd2 Re8 13. d4 b4 14. Na4 Nxe4 15. Qd3
Na5 *
Position (FEN): 2rqr1k1/1b2bppp/p2pp3/n1p5/Np1Pn3/P2QBN1P/BPP2PP1/R3R1K1 w - - 2 16
White to move.
Themes:  Middlegame  
Puzzle rating: 2067
Best move: axb4