I've been using Lichess as a password generator, seeding it with my opening moves. A key derivation function needs to be computationally hard, and I figured chess was a good start. Sadly, I've also inflicted a CAPTCHA-style nightmare every time I need to use a password. OTOH, that also goes for Joe Hacker trying to get to my passwords.
But now I wonder how this leak affects my account security. Maybe I should just switch to Go?