RULES AND FEATURES
To be honest, the reason for including the abbreviation 3D in the name is unclear, since externally there are no signs of volume in this Sudoku. Perhaps the puzzle philosophy involves the use of some kind of 3D thinking.
In general, the puzzle is a traditional Sudoku with a 9x9 square. All the same nine small squares, with 9 cells in each, make up one large square. To solve the puzzle, you need to choose the correct number for each cell. According to the rules, no number in a small square should occur more than once. The same restriction applies for large columns and rows — each number in each row and column must be unique, i.e. not repeated.
To put a digit in a cell, select it in the lower number row (from 1 to 9), and then click on the box where you want to put it. The game time is not limited, but statistics are kept.
This Sudoku can be printed on a printerby clicking the Print button (at the bottom). The difficulty of the puzzle is selected before playing. There are 4 options available: Easy, Medium, Hard and Very hard-choose your desired level depending on your training.
You can play the game 3D SUDOKU online 24 hours a day for free. It is no need to download and install it on your computer, and it is also not required you to be the registered user. Just ckick and enjoy. See also a set of related games below on that you might be interested to look.