Chess puzzle (Advantage)
Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 c5 6. b3 Nc6 7. Be3 cxd4 8. Nxd4
Bc5 9. Bb5 Nxd4 10. Bxd4 Bxd4 11. Qxd4 a6 12. Bd3 b5 13. O-O Bb7 14. a3 O-O 15.
a4 b4 16. Qxb4 Qc7 17. Ne2 Nxe5 18. Nd4 Nxd3 19. cxd3 Rac8 20. Rac1 *
Position (FEN): 2r2rk1/1bq2ppp/p3p3/3p4/PQ1N4/1P1P4/5PPP/2R2RK1 b - - 2 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1018
Best move: Qxc1