Chess puzzle (Advantage)
Opening: Modern_Defense, Modern_Defense_Gellers_System
Moves: 1. e4 g6 2. d4 Bg7 3. c3 d6 4. Nf3 Nf6 5. Be2 O-O 6. Nbd2 Nbd7 7. O-O c5 8. d5
Bh6 9. c4 Nb6 10. Qc2 Bg7 11. Rb1 Bd7 12. b3 Bg4 13. Bb2 Nbd7 14. h3 Bxf3 15.
Bxf3 Qa5 16. Rfe1 b5 17. Qc1 Rfe8 18. Nf1 Qxa2 19. Nh2 Qxb3 *
Position (FEN): r3r1k1/p2nppbp/3p1np1/1ppP4/2P1P3/1q3B1P/1B3PPN/1RQ1R1K1 w - - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1102
Best move: Bxf6