Chess puzzle (Advantage)
Moves: 1. d4 Nf6 2. c4 d5 3. Nc3 e6 4. Bg5 Bb4 5. a3 Bxc3+ 6. bxc3 h6 7. Bh4 g5 8. Bg3
Nc6 9. e3 b6 10. c5 Ne4 11. Qc2 Nxg3 12. fxg3 e5 13. Nf3 exd4 14. cxd4 Qe7 15.
Bb5 Bb7 16. cxb6 Qxe3+ 17. Kd1 O-O 18. Bxc6 Bxc6 19. Qxc6 cxb6 20. Qc2 Rac8 21.
Qd2 *
Position (FEN): 2r2rk1/p4p2/1p5p/3p2p1/3P4/P3qNP1/3Q2PP/R2K3R b - - 3 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1262
Best move: Qb3+