http://en.wikipedia.org/wiki/Sudoku#Mathematics_of_Sudoku

for more on the math. ]]>

sudoko is interesting. I’ve tried it a few times, but with friends. I too have never really gotten too motivated to do it on my own. Occasionally one of the super-easy red eye ones. I guess I just don’t like puzzles that are too challenging- might as well be solving a problem then, yeah?

]]>@misc{cs.DS/0507053,

title = {{Nonrepetitive paths and cycles in graphs with application to

Sudoku}},

author = {David Eppstein},

eprint = {cs.DS/0507053},

howpublished = {ACM Computing Research Repository},

month = {July},

year = {2005}}

You can play with your friends in a multi-player session. It is fun and challenging.

]]>