Anon in my "unlisted" study. I didn't send the link

Kinda mysterious topic. I created an unlisted study and started adding my chapters. I didn't have the study opened from any other browser/device, it has been just created. I also didn't share the link. After something like 10 minutes of editing I saw that somebody second is in my almost private study.

I refreshed, nothing changed. Two people, me and the anon. I got scared for my precious positions and changed the visibility to "invite only". Anon disappeared.

I have two versions as of why this happened:
1. Interface bug (most likely)
2. Problem with link generation (anon was real)

It may be worth adding that I probably created study as public, but changed this after half a minute. No anon was there at the moment. Incident happened after study had been unlisted for 10 minutes.

Sometimes it happens to me, monitoring some games no one else would monitor:)

Not sure about the timing but it's possible it could be a google bot webcrawling and indexing the newly created pages.

@UnBricioloDiAllegria said in #1:
> I got scared for my precious positions and changed the visibility to "invite only".

Why didn't you do that in the first place? Are you a Ding fan and wanted to leak your prep on Lichess like him?

@spidersneedlovetoo said in #3:
> Not sure about the timing but it's possible it could be a google bot webcrawling and indexing the newly created pages.

But there wouldn't be any links to the study if it's unlisted, right? Unless he's using Chrome or something, then it might be sending the pages he's browsing to Google or someone else.

@AsDaGo said in #4:
> But there wouldn't be any links to the study if it's unlisted, right?

The profile contains a link to one's studies.

@mcgoves said in #5:
> The profile contains a link to one's studies.

I tried creating an unlisted study, and it wasn't listed on my profile when not logged in (lichess.org/study/by/AsDaGo).

Ok.

Did you get so nervous that you passed gas?

> But there wouldn't be any links to the study if it's unlisted, right? Unless he's using Chrome or something, then it might be sending the pages he's browsing to Google or someone else.

I think that's a good point but i know web crawlers crawl *everything* that's not private or password protected so: is unlisted and private the same thing?....greater minds than mine may need to chime in,

@spidersneedlovetoo said in #9:
> I think that's a good point but i know web crawlers crawl *everything* that's not private or password protected so: is unlisted and private the same thing?....greater minds than mine may need to chime in,

No, it's not the same, unlisted study is available to anyone with link. So your idea about web crawlers may be a valid version, I'm just still not sure about timings. Anyways, if lichess devs are reading that, please just note my problem and investigate it in case there are complaints from other users.