Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Other_variations
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 e6 7. Be2 Be7 8. O-O
O-O 9. Re1 a6 10. h3 Qb6 11. Nxc6 bxc6 12. Rb1 Bb7 13. b4 Rfd8 14. b5 axb5 15.
a4 b4 16. Be3 c5 17. f3 Qc6 18. Nb5 Rxa4 *
Position (FEN): 3r2k1/1b2bppp/2qppn2/1Np5/rpP1P3/4BP1P/4B1P1/1R1QR1K1 w - - 0 19
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1242
Best move: Qxa4