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Sudoku
Play Sudoku online for free
Are you ready for a numerical challenge that is both fun and educational? Introducing Sudoku, a game that tests your cognitive skills and offers endless entertainment.
Playing Sudoku
Here's how to play Sudoku successfully:
- Choose your level: If you're a beginner, start easy and gradually move on to harder levels.
- Analyze the board: You'll be given a 9x9 grid, partially filled with numbers. Your task? Fill in the blank squares.
- Follow the rules: The numbers 1 through 9 can only appear once in each row, each column, and each 3x3 box.
- Use elimination: Not sure which number goes where? Check the existing numbers to narrow down your choices.
- Practice: Stuck? Try a different section or start over. Practice makes perfect!
Why play Sudoku
Why choose Sudoku? Here are some benefits:
- Train your brain: Enhance your logical thinking and focus.
- Diverse levels: No two games are the same, thanks to a multitude of levels.
- Always free: Enjoy countless hours of gameplay without any costs.
- Play anywhere: Accessible on any device, anytime, anywhere.
Play now
So, are you ready to challenge yourself? Step into the world of Sudoku and become a numerical master! With each puzzle, you grow smarter and more adept. Take on the challenge, start now, and get those brain cells working!
FAQ - Frequently Asked Questions
What distinguishes a 'diagonal' Sudoku from a regular one?
In a diagonal Sudoku, in addition to the regular rules, the two main diagonals must also contain 1-9 once.
Why are some cells shaded in certain Sudoku puzzles?
Shaded cells, often found in variants like “Center Dot” or “Asterisk”, add extra constraints or patterns to solve.
What's a 'naked pair' in Sudoku strategy?
A 'naked pair' occurs when two cells in a row, column, or box have only the same two possible numbers. These numbers can be eliminated from other cells in that unit.
Is it possible to solve every Sudoku without guessing?
Yes, every valid Sudoku has a logical pathway to its solution. Guessing is not necessary when applying the right techniques.
How does the 'swordfish' technique work in Sudoku?
The 'swordfish' is a technique that deals with candidates that appear exactly three times in rows OR columns. When these align correctly, other candidates can be eliminated.
Can a Sudoku have multiple solutions?
A well-constructed Sudoku should only have one solution. Multiple solutions suggest the puzzle isn’t crafted properly.
What’s the significance of 'givens' in Sudoku?
Givens' are the numbers pre-filled in the puzzle. They provide the starting point and their placement determines the puzzle's difficulty.
How does the 'X-wing' strategy help in solving Sudoku?
The 'X-wing' focuses on two rows and columns. When two numbers can only fit in the exact two columns in those rows (or vice-versa), they can be removed elsewhere.