Games of players playing against themselves, example link included

[Tobs40]

There are 731 players having played themselves in the standard .bz2 files up to (and including) June 2020 at https://database.lichess.org/

Those also include games which can be found over the normal Lichess webpage.

Here's an example from record holder wotjek12 who has played himself a whopping 16 times: https://lichess.org/9VRI5DLi

I'd like to suggest:
-preventing future self-plays from happening
-deleting all self-play-games from the webpage, API as well as .bz2 archives
-until then add a hint to https://database.lichess.org/ (I was so happy when my database query finally finished after 2 hours only to find out that somehow there was an odd number of undirected "a has played b" edges.)

[ornicar]

rated self play has been forbidden many years ago. The example you show is from 6 years ago.

[Tobs40]

rated self play has been forbidden many years ago. The example you show is from 6 years ago.

My program has finished parsing and it appears as there are selfplay games from 2013-12 to 2016-2 (inclusive) only, alright.

Could we add a small hint to the database page?

[Tobs40]

I forgot that anonymous users can only play other anonymous users so if I want all non-selfplay, non-anonymous games including the games of the player "Anonymous" I just need to check for the equality of the "names" or the players