Chess puzzle (Advantage)
Opening: Horwitz_Defense, Horwitz_Defense_Other_variations
Moves: 1. d4 e6 2. c4 c5 3. d5 exd5 4. cxd5 d6 5. e4 h6 6. Nc3 Nf6 7. Bd3 Be7 8. Nge2
Nfd7 9. O-O Ne5 10. Be3 O-O 11. Rc1 f5 12. f3 Bg5 13. Bxg5 Qxg5 *
Position (FEN): rnb2rk1/pp4p1/3p3p/2pPnpq1/4P3/2NB1P2/PP2N1PP/2RQ1RK1 w - - 0 14
White to move.
Themes:  Opening  
Puzzle rating: 1257
Best move: f4