This is the 4th Sudoku which i contributed to
Czech Republic National Academic Championsh
This is my 20th Sudoku contribution to:
Daily League! The League of Extraordinary Ladies and Gentlemen
Remember that you can solve this puzzle from the League online on the Sudokucup Guest League page with a 24 hr delay.
Place numbers in the grid such that each row,column and 3*3 box contain the numbers 1-9.