Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_London_System
Moves: 1. d4 d5 2. Bf4 Nf6 3. Nf3 Bg4 4. e3 Nc6 5. c3 e6 6. Bd3 Bd6 7. Bg3 Bxg3 8.
hxg3 Qd6 9. Nbd2 O-O-O 10. Qa4 Kb8 11. Ne5 Nxe5 12. dxe5 Qxe5 13. Qb3 Rd6 14.
e4 h5 *
Position (FEN): 1k5r/ppp2pp1/3rpn2/3pq2p/4P1b1/1QPB2P1/PP1N1PP1/R3K2R w KQ - 0 15
White to move.
Themes:  Middlegame  
Puzzle rating: 1567
Best move: f4