Chess puzzle (Advantage)
Opening: Grunfeld_Defense, Grunfeld_Defense_Other_variations
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. h3 O-O 6. Bd3 dxc4 7. Bxc4 c6 8. g4
Nd5 9. Ne4 e6 10. h4 Nd7 11. h5 N7b6 12. Bd3 e5 13. hxg6 fxg6 14. dxe5 Bxe5 15.
f4 Bxf4 *
Position (FEN): r1bq1rk1/pp5p/1np3p1/3n4/4NbP1/3BP3/PP6/R1BQK1NR w KQ - 0 16
White to move.
Themes:  Middlegame  
Puzzle rating: 1253
Best move: exf4