Introducing Kenkuro puzzles

In my previous newsletter I sent out a puzzle that is very special because it’s a completely new kind of puzzle. It wouldn’t be fair if I didn’t share it with all of you. So, if you want to see…

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CalcuDoku clarification

In order to avoid any further confusion with KenKen(R) and KenDoku(TM) trademarks of Nextoy, LLC, I have changed the name of these puzzles to CalcuDoku. This name is also used by other publishers but it is not trademarked.

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