Chess puzzle (Advantage)
Moves: 1. e4 e6 2. Bb5 Ke7 3. d4 Qe8 4. Nf3 Kd8 5. c4 a6 6. Ba4 c6 7. Nc3 Bb4 8. Bd2
Nf6 9. e5 Bxc3 10. exf6 Bxd2+ 11. Qxd2 gxf6 12. O-O b5 13. cxb5 axb5 14. Bb3 f5
15. a4 Qe7 16. axb5 Rxa1 17. Rxa1 cxb5 18. Ra8 Qd6 19. Qa5+ Ke7 20. Qxb5 Qc6 *
Position (FEN): Rnb4r/3pkp1p/2q1p3/1Q3p2/3P4/1B3N2/1P3PPP/6K1 w - - 1 21
White to move.
Themes:  Middlegame  
Puzzle rating: 1783
Best move: Qb4+