I will be showing the most basic to not so basic methods,trick and tips to finish a sudoku.this instructable is for anyone who plays or wants to play sudoku even if you don't know how to play.
I'll start with the basic thing and progress to the less basic things.
Step 1: How to play sudoku
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. A region has thicker lines surrounding it. This simply makes it easier to play the game.