Rogo is a new math-type puzzle that was invented in 2009.
This video shows how it works:
You can find out more about it here: Rogo website
There is a new puzzle each day here: Daily puzzle
Find out about the iPhone app here: iTunes
Tips and ideas here for mathematics teachers who want to use Rogo: Teaching tips
Explanation of the Operations Research in Rogo here: Rogo and OR.
The link in text “You can find out more about it here: Rogo website” is incorrect. I guess it should point to http://www.rogopuzzle.co.nz (instead of http://learnandteachstatistics.wordpress.com/rogo/www.rogopuzzle.co.nz).
Thanks Amber J. I think I have fixed it now.