Chess puzzle (Advantage)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Other_variations
Moves: 1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. Bc4 Nc6 5. Be3 Ng4 6. Qe2 Nxe3 7. Qxe3 Bf5 8.
O-O-O e6 9. Nge2 Bd6 10. d5 exd5 11. Bxd5 O-O 12. a3 Qf6 13. f4 a6 14. h3 Rae8
15. g4 Be6 16. Bxe4 Bc4 17. g5 Qe6 18. Ng3 Na5 19. Qd4 *
Position (FEN): 4rrk1/1pp2ppp/p2bq3/n5P1/2bQBP2/P1N3NP/1PP5/2KR3R b - - 4 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1126
Best move: Bxf4+