play The rules of Sudoku are simple but the depth of the game is immense. Every well-posed Sudoku puzzle has a unique solution that can be reached through logic
The diagonal constraint adds a new layer of complexity that keeps even expert solvers engaged.
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Brain Training
Improve your logical thinking and pattern recognition with this enhanced puzzle format.
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Faster Solutions
Paradoxically, the extra constraint can sometimes make puzzles easier to solve!
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Competition Ready
X-Sudoku appears in world championships. Practice here to compete globally.
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Play Anywhere
Our responsive design works perfectly on desktop, tablet, and mobile devices.
advanced sudoku techniques
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play What is Sudoku and How to Play?
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play Advanced Sudoku Solving Techniques
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play Sudoku Strategies: Scanning and Marking
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play Tips for Improving Your Sudoku Speed
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play History of the Sudoku Puzzle
play Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids contain all of the digits from 1 to 9. wooden sudoku Modern Sudoku was popularized by Nikoli in Japan in the 1980s. It has since become a global phenomenon, with daily puzzles appearing in newspapers and online platforms worldwide. sudoku puzzles evil Sudoku variants like Killer Sudoku, Jigsaw Sudoku, and Sudoku-X provide additional challenges for players looking for something different from the classic version. wooden sudoku Sudoku variants like Killer Sudoku, Jigsaw Sudoku, and Sudoku-X provide additional challenges for players looking for something different from the classic version. sudoku advantages There are several difficulty levels in Sudoku, ranging from easy for beginners to expert for seasoned players. Solving techniques include scanning, cross-hatching, and identifying candidate numbers.
