This was one of the cooler teaching examples I've ever played with... awesome job! Appreciate the warning that the 5 color map is "very difficult". It felt easy enough, and I would have spent an hour on it!

This was so much cooler than just being told that 4 colors is enough for every map – this one will stick with me.

It would be wonderful if schools taught a bit more like this – I almost felt like I discovered it myself!