There are two things here. Can somebody please tell me if these functions already exist, and if it just the case that I can't find them....or, if they do not exist, can I suggest them please.
First: 'Add game to library' function. There are some games that, for whatever reason (maybe I want to study a mistake in more detail, or explore a line in more detail) I'd like to save to a library of my games. Does this function already exist?
Secondly: 'Search by centipawn loss' function. I was idly searching, and wondered what is the 'best' game I have played in terms of fewest inaccuracies, mistakes, blunders, but couldn't find a way to do that in advanced search options. Is there such a way?
If not, can I suggest both, especially the first option. I think a library of games that a player wants to revisit for whatever reason might be useful.