When we find a new Sudoku variant you can read it here at our puzzle weblog.
To make life more easier for you we started a new web page with the Sudoku variants we found so far. The list in alphabetic order gives you a link to the Sudoku variant and a short description. The list is contains already more than 20 different Sudoku versions.
If you know Sudoku variants not listed yes, please let us know. Happy Puzzling!