[mikesurowiec]

Wow, very impressive! I will definitely be trying this out. It reminded me of my discrete mathematics class, so now I'm wondering if there are any other cool principles that can be applied to design

[kylemaxwell]

Fair point, it's really basic combinatorics but well applied and properly executed.

[euccastro]

And number theory.

[alsomike]

892 unique ways to partition a 3x4 grid: http://www.dubberly.com/concept-maps/3x4grid.html

They also have an interactive tool that generates HTML/CSS: http://www.3x4grid.com