# ETOOBUSY ðŸš€ minimal blogging for the impatient

# Matt Parker on Dobble

**TL;DR**

Matt Parker made a video about the maths behind Dobble.

It was interesting to see the video and be reminded of something I wrote about three years ago: Some Maths for Dobble.

There were a few things that left meâ€¦ *dissatisfied*. As an example,
the whole process where you make a circle of cards and use a specific
sequence to generate the cards seems a bit as coming out of thin air.
meanâ€¦ why 57 cards? Why those displacements? Mattâ€™s explanation about
*why* it works is fantastic, though.

*Dissatisfaction* is an engine, though. There are a couple of loose ends
that will be interesting to follow.

I was curious about generating the cards with 102 pictures on,
leveraging $PG(2, 101)$. Using pg2 it took me about 70 minutes to
generate all the arrangementsâ€¦ Iâ€™m not impressed by my brute-force
algorithm to find all *orthogonal* sequencesâ€¦ ðŸ™„