Ask HN: Help me find a post from the early days of HN

Dear HN users,

I know this is a very weird request but I’m banging my head trying to find it since days.

In the early days of HN there was a post where the anonymous poster challenged all the users to try and find their identity based on their writing style and comments.

I searched HN using HN.Algolia but I couldn’t find it. Does anyone know what that post was?