Sudoku

is a puzzle in Puzzledom.
== How to play ==
The objective is to fill a 9x9 grid so that each column, each row, and each of the nine 3x3 boxes (also called blocks or regions) contains the digits from 1 to 9. A cell is the smallest block in the game. A row , column and region consists of 9 cells and the whole game consists of 81 cells.
== Solutions ==
=== Classic ===
* Novice A
* Novice B
* Regular A
* Regular B
* Advanced
* Expert
* Master
=== Extension ===
* Novice EX
Category:Puzzles