Three dimensional (3D) sudoku variants...

Next up in my list of sudoku variants that you sometimes see is 3D sudoku.

This particular puzzle type is one of the most dull variants that there is - pretending to have a 3D sudoku on paper adds nothing of interest to the solving mix and if anything is just a bit tedious as you have to pretend to look around corners, as it were, of a cube.

There are some more fun variants of cube sudoku or 3D sudoku though whereby at least there are a range of different patterns and shapes available so at least with that every puzzle is different in a similar manner to what you find with jigsaw sudoku - each grid pattern is different and plays different to other grid patterns.

However overall it is not much of a fun variant, many find it confusing - particularly if not printed in colour, and additionally it is probably why it is not seen in many places!