I present you a Multi Sudoku composed of 4 Sudoku. Each Sudoku shares 4 regions with two another different Sudokus.
The printable files PDF.
Puzzle : quad20_00948.pdf
Solution : quad20_00948_sol.pdf
You could find these puzzles in my two books on Amazon US : Spectacular Sudoku and Stunning Sudoku and any other Amazon Website.
Keep Smiling !
