Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Delayed_Alapin_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. cxd4 Nc6 7. Nc3 Bb4 8. Bd2
Bxc3 9. bxc3 b6 10. Bc4 Nce7 11. O-O Bb7 12. a4 Rc8 13. Bxd5 Nxd5 14. Qb3 d6
15. c4 Ne7 16. exd6 Nf5 17. d7+ Qxd7 18. Ne5 Qxd4 *
Position (FEN): 2r1k2r/pb3ppp/1p2p3/4Nn2/P1Pq4/1Q6/3B1PPP/R4RK1 w k - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1464
Best move: Qb5+