Would it ever be feasible to have a search function that would tell your lifetime score against a particular opponent, along with when and where you played?
Just wondering, because there was a time up till around my 80th tournament when i could recall every opponent that I had ever played and when I had played them. Now however, apparently a few are starting to slip my mind and going through a hundred different tournaments and thousands of results is not so easy.
I maintain a spreadsheet for my son for this very purpose. It tracks every rated game he’s played (opponent name/ID, rating, color he played, outcome), as well as details for every tournament (place, date, time control, trophies/cash won, performance rating, etc). How’s that for being an obsessive chess parent?
It’s an interesting idea though maybe a bit complicated to implement because of how we store opponent data in the crosstable records.
It is not likely to get on the development schedule for quite some time.
I’m not sure what format the output should be, either. I suppose event by event.
Well all i can ask is that it were to actually get on the developement schedule 
. Many players do this themselves but it takes quite a massive effort(i used to) but usually it’s incomplete, or inaccurate. I recently saw that a master Jim Rizzitano had a complete record (100 or so games)of his score vs FM John Curdo(whom i recently knocked off) colors, dates, openings scored. I wouldn’t need all that just dates, events name and overall result.
Thanks