Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 Nc6 3. h3 Nf6 4. Qc2 d6 5. Bb5 Qb6 6. Qa4 Bd7 7. d3 a6 8. c4 Ne5
9. Bxd7+ Nfxd7 10. Qc2 g6 11. Nc3 e6 12. a3 Bg7 13. Rb1 Nc6 14. Bd2 Nd4 15. Qd1
O-O 16. Nf3 Nb3 17. Be3 Qa5 *
Position (FEN): r4rk1/1p1n1pbp/p2pp1p1/q1p5/2P1P3/PnNPBN1P/1P3PP1/1R1QK2R w K - 11 18
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 921
Best move: Qxb3