Our friends at math and chess just sent us some very interesting exercises. Here is an example. Please feel free to check out their website for more cool stuff.
Chess Daily News from Susan Polgar
Math and chess exercises
About Author
good stuff here
More samples can be seen at the following link:
http://ia360915.us.archive.org/3/items/FrankhoIqChessMazesFromHoMathAndChess/FrankhoIqChessMazes.pdf
More details, please visit http://www.mathandchess.com