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What is Sudoku

Sudoku is a logic-based number placement puzzle game that originated in Japan. The game consists of a 9×9 grid, which is further divided into nine 3×3 sub-grids. The objective of the game is to fill each row, column, and sub-grid with numbers from 1 to 9, with the condition that no number can be repeated in any row, column, or sub-grid.

Initially, some numbers are already placed in the grid, and the player needs to use logic and deduction to fill in the remaining numbers. The game requires no math or arithmetic skills, but instead relies on logical reasoning and pattern recognition.

Sudoku has gained worldwide popularity as a fun and challenging puzzle game, and is often found in newspapers, magazines, and online puzzle websites. There are various difficulty levels of Sudoku puzzles, ranging from easy to extremely challenging, which can test the skills of even the most experienced puzzle enthusiasts.

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Sudoku Basics:

1. Understand the Grid:

The Sudoku grid is a 9×9 square, divided into smaller squares called “cells.”
– It’s further divided into nine 3×3 subgrids or “regions.”

2. Goal of the Game:

Your objective is to fill the grid so that each row, column, and 3×3 region contains all the digits from 1 to 9, without repeating any numbers within the row, column, or region.

How to Play:

1. Start with the Given Numbers:

Every Sudoku puzzle begins with some cells already filled in. These are your clues.

2. Scan for Definites:

Look for rows, columns, or regions where a certain number can only go in one spot. For example, if a row has every number from 1 to 9 except for 5, you know that 5 must go in the empty spot.

3. Use Process of Elimination:

For cells that aren’t obvious, consider what numbers are already in that row, column, and region. Eliminate those numbers as possibilities for the empty cell.

4. Fill in the Blanks:

Once you’ve figured out which number fits in an empty cell, write it in. It’s common to use pencil if you’re playing on paper, in case you need to make changes.

5. Check Your Work:

Regularly check to ensure that no row, column, or 3×3 region has the same number twice.

6. Repeat the Process:

Continue scanning, eliminating, and filling in until the entire grid is complete.

Sodoku Tips:

Start with Easy Puzzles:

If you’re new to Sudoku, begin with easier puzzles that have more numbers filled in and gradually work your way up to more challenging ones.

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Use Pencil Marks:

In more difficult puzzles, you might not be able to immediately know where a number goes. In these cases, lightly write all possible numbers in a cell. As you fill in more of the grid, you can narrow down the possibilities.

Patience is Key:

Sometimes you might get stuck. Take a break, or try looking at the puzzle from a different angle.

Common Mistakes to Avoid:

Repeating Numbers:

Remember, each number 1-9 must appear once and only once in each row, column, and 3×3 region.


Sudoku is a game of logic. Avoid random guesses, as they can lead to errors that are hard to backtrack.

Remember, Sudoku is a puzzle of logic and patterns. It might seem tricky at first, but with practice, you’ll start to see the patterns and enjoy the challenge! Happy puzzling!

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