Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Colle_System
Moves: 1. d4 Nf6 2. e3 d5 3. Bd3 g6 4. Nf3 Bg7 5. O-O O-O 6. Nbd2 b6 7. c4 Bb7 8. cxd5
Nxd5 9. e4 Nf6 10. Re1 c5 11. e5 Nd5 12. Be4 cxd4 13. Nxd4 Bxe5 14. N2f3 Bg7
15. Qb3 e6 16. Bg5 Qd7 17. Rad1 Nf6 18. Bxf6 Bxf6 19. Bxb7 *
Position (FEN): rn3rk1/pB1q1p1p/1p2pbp1/8/3N4/1Q3N2/PP3PPP/3RR1K1 b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1119
Best move: Qxb7