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How To Play Sudoku

In Sudoku, you are presented with a 9×9 grid of 9×9 grids filled with the numbers 1 through 9. The goal is to fill the entire board without using the same number twice in any row, column, or 9×9 sub-grid. Despite it’s first appearance, there is no math involved in solving a Sudoku puzzle, only logic.

Basic Sudoku Logic

As you play a game of Sudoku, the puzzle becomes easier as you solve for each spot on the board. There are many strategies for doing this, and some of them can get very tricky! Here are a couple of the most basic thought processes to get you started:

  1. Complete nearly filled rows, columns, and grids – if your puzzle begins with a row, column, or sub-grid filled with 8 digits, there is only 1 possibility left, so fill it in with confidence.
  2. Check a single number across rows, columns, and grids – looking at a group of 3 rows, columns, or grids, you will often find a situation where the same number is already filled in 2 of them. This drastically reduces the number of possible spots for the third number. Depending on the starting placement of numbers, you may only have 1 possible spot right off the bat.

These two strategies are probably the most important beginner’s logic in the game, and after you have mastered that way of thinking, you will surely come up with your own advanced methods. Remember you can repeat these everytime you fill in a new spot, because a new possibility may have arisen.

In closing, the most important thing to remember about Sudoku is this: you should never have to guess where the next number goes.. there should always be a logical place to put it. It’s just up to you to find it. (Read More..)