Chess puzzle (Advantage)
Opening: Old_Indian_Defense, Old_Indian_Defense_Czech_Variation
Moves: 1. d4 d6 2. c4 c6 3. Nf3 Nf6 4. g3 g6 5. Bg2 Bg7 6. Nc3 O-O 7. O-O a6 8. Qc2 b5
9. a3 bxc4 10. e4 d5 11. e5 Nfd7 12. b3 e6 13. bxc4 dxc4 14. Qa4 Nb6 15. Qb4 a5
16. Qb2 Qc7 17. Rb1 Nd5 18. Nd2 Nd7 19. Nxc4 Nxc3 *
Position (FEN): r1b2rk1/2qn1pbp/2p1p1p1/p3P3/2NP4/P1n3P1/1Q3PBP/1RB2RK1 w - - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1010
Best move: Qxc3