The second leg of the Sudoku Grand Prix takes place at LMI Website next weekend. Karel is already producing some sudokus on sudokucup.com website for practice. I am also creating other variants from the LMI IB for practice and will be uploading 1 new puzzle everyday at my blog.
Today we have the Odd Even Big Small Sudoku. The link is given below. Hope you enjoy.
Rishi Puri (purifire)
A Quad Sum Sudoku.
http://rishipuri.blogspot.in/2013/02/quad-sum-sudoku-2013-1_2376.html
An XV Sudoku for practice.