This variant of Sudoku is easy to do. The usual rules apply: in each row, column and region the numbers from 1 to 9 must appear only once. But as an additional constraint the grey cells must have even numbers : 2,4,6 and 8. This means that the white cells have odd numbers: 1,3,5 and 7. So I have created a new item in the menu where all the futur Sudoku Even will appear. Also this variant could be applied to Super Sudoku of size 16x16 (see the last one). Sometimes we do not want to rackle our brain then a gentle puzzle is welcome. The Sudoku even is perfect for that.
To begin, I offer you three puzzles of size 9x9.
1)
The printable files PDF.
Puzzle: sudo_even_00001.pdf
Solution : sudo_even_00001_sol.pdf
2)
The printable files PDF.
Puzzle: sudo_even_00002.pdf
Solution : sudo_even_00002_sol.pdf
3)
The printable files PDF.
Puzzle: sudo_even_00003.pdf
Solution : sudo_even_00003_sol.pdf
And the last one is a Super Sudoku of Size 16x16
The printable files PDF.
Puzzle: super_even_00222.pdf
Solution : super_even_00222_sol.pdf
I would like to remind you that you can find Super Sudoku even in my latest book : Super Sudoku 16x16 Variations. This book is full of Super Sudoku in many forms and shapes. It is a must for all fans of Super Sudoku
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