Chess puzzle (Advantage)
Opening: Zukertort_Opening, Zukertort_Opening_Black_Mustang_Defense
Moves: 1. Nf3 Nc6 2. c4 Nf6 3. d4 d5 4. c5 e6 5. b4 Be7 6. b5 Na5 7. e3 O-O 8. Qa4 b6
9. c6 Nc4 10. Bxc4 dxc4 11. Qxc4 a6 12. Qa4 Nd5 13. Bb2 f6 14. O-O e5 15. dxe5
fxe5 16. Bxe5 Be6 17. bxa6 Bd6 18. Bd4 *
Position (FEN): r2q1rk1/2p3pp/PpPbb3/3n4/Q2B4/4PN2/P4PPP/RN3RK1 b - - 2 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1548
Best move: Rxf3