Sodukube: the 3D Sudoku
The free printable sudoku puzzles that you see in the Internet and in the book are only 2D or only width * length Sudoku. However, for those who have done Sudoku for a long time might want to do something more advance and more challenge.
You can try the 3D Sudoku or we call Sudokube. Sudoku looks similar to Rubik but you don't need to have the same color in the same but you need to have identical number from 1 to 9 in each face of the rubik.
The skill used to solve sudokube is almost the same as rubik's. If you are familiar with Rubik you should be able to solve Sudokube as well.
Sudokube is not a new thing. It's just an applied idea to make your sudoku more challenging. Most of all, it looks really cool when you play the Sudokube in public place. At least, it looks a lot cooler than obsessing yourself with the 2D free printable sudoku puzzles. Don't you think so?
