Chess puzzle (Advantage)
Opening: Modern_Defense, Modern_Defense_Two_Knights_Variation
Moves: 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Nc3 h6 5. h3 e6 6. Be3 Ne7 7. Qd2 a6 8. Be2 f5
9. exf5 Nxf5 10. Bd3 Qf6 11. Ne2 Nxe3 12. Qxe3 O-O 13. Nf4 *
Position (FEN): rnb2rk1/1pp3b1/p2ppqpp/8/3P1N2/3BQN1P/PPP2PP1/R3K2R b KQ - 2 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1671
Best move: Qxf4