Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 d5 2. e3 Nf6 3. c4 dxc4 4. Bxc4 a6 5. Nf3 Bg4 6. Nc3 Nc6 7. a3 b5 8. Be2
e6 9. b4 h6 10. Ne5 Nxe5 11. dxe5 Qxd1+ 12. Bxd1 Bxd1 13. Nxd1 O-O-O *
Position (FEN): 2kr1b1r/2p2pp1/p3pn1p/1p2P3/1P6/P3P3/5PPP/R1BNK2R w KQ - 1 14
White to move.
Themes:  Middlegame  
Puzzle rating: 1590
Best move: exf6