Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Other_variations
Moves: 1. d4 d5 2. c4 c6 3. e3 Bf5 4. Nc3 Nf6 5. Nf3 e6 6. a3 Be7 7. Bd3 Bxd3 8. Qxd3
O-O 9. O-O dxc4 10. Qxc4 Nbd7 11. Re1 Nb6 12. Qd3 h6 13. Qc2 Rc8 14. e4 Qc7 15.
b4 a5 16. e5 axb4 *
Position (FEN): 2r2rk1/1pq1bpp1/1np1pn1p/4P3/1p1P4/P1N2N2/2Q2PPP/R1B1R1K1 w - - 0 17
White to move.
Themes:  Middlegame  
Puzzle rating: 1579
Best move: exf6