Chess puzzle (Advantage)
Opening: Kings_Pawn_Game, Kings_Pawn_Game_McConnell_Defense
Moves: 1. e4 e5 2. Nf3 Qf6 3. Nc3 c6 4. d3 Bc5 5. Bg5 Qg6 6. Qd2 d6 7. a3 h6 8. Be3
Ne7 9. Bxc5 dxc5 10. Nxe5 Qe6 11. Qf4 O-O 12. Be2 f5 13. Qg3 *
Position (FEN): rnb2rk1/pp2n1p1/2p1q2p/2p1Np2/4P3/P1NP2Q1/1PP1BPPP/R3K2R b KQ - 1 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1146
Best move: f4