endgame: 2bishops+king vs. King

sometimes what happens is that all the pawns are exchanged but an endgame of king and 2 bishops vs. king appears or knight+bishop+ king vs king appears. we should know how to checkmate with either. lets try the former combination first since it is easier.

first few moves of the puzzle may differ from person to person but once the oposing king is on the end rank or file, the patern should be the same