Actually, endgame is the interesting part of chess.What is the difficult endgame??
Endgames with a large discrepancy in material are mostly easy. Endgames that match fairly closely in material tend to have more difficult positions as the number of pieces increases.
The endgame with the most difficult positions is probably KQRRBBNNPPPPPPPP vs. KQRRBBNNPPPPPPPP.
Actually, endgame is the interesting part of chess.What is the difficult endgame??