Chess puzzle (Advantage)
Opening: Polish_Opening, Polish_Opening_Bugayev_Attack
Moves: 1. b4 e5 2. a3 a6 3. d3 Nc6 4. Bb2 d5 5. e3 Be6 6. Nd2 Nf6 7. e4 d4 8. Ngf3 Be7
9. c3 O-O 10. cxd4 exd4 11. Be2 h6 12. O-O Nh7 13. g3 Bf6 14. e5 Bh3 *
Position (FEN): r2q1rk1/1pp2ppn/p1n2b1p/4P3/1P1p4/P2P1NPb/1B1NBP1P/R2Q1RK1 w - - 1 15
White to move.
Themes:  Middlegame  
Puzzle rating: 1377
Best move: exf6