Free Online Sudoku Puzzles

Sudoku Puzzles Online

Sudoku is a popular puzzle game that combines logic and numbers in a captivating way.

The game consists of a 9x9 grid, divided into nine 3x3 subgrids or regions. The objective is to fill in the entire grid with numbers from 1 to 9. The puzzle starts with some numbers already provided in various cells, and the challenge is to complete the grid following certain rules:

1. Each row, column, and 3x3 subgrid must contain every digit from 1 to 9 with no repetition.
2. The starting numbers (given clues) are strategically placed so that the puzzle has a unique solution. These numbers guide the player in determining the placement of the remaining numbers.

Solving Sudoku doesn’t require complex calculations or mathematical formulas. It’s about deduction and logical reasoning. The difficulty levels range from beginner to expert. With millions of possible starting configurations, you’ll never run out of new puzzles to solve.

Free Sudoku Puzzles Online
Sudoku Online	Sudoku Puzzles	Sudoku Variants

Read here for more information about Sudoku Rules.

You may also want to have a look at this video series of Sudoku Tips which will show you the different techniques that can be used to solve Sudoku Puzzles.

Mini Sudoku for Kids

Sudoku can also be played with 9 unique pictures or symbols. There are some examples of such games in this Sudoku for Kids section.

Sudoku 4x4
These 4x4 Sudoku for Kids are set to a general difficulty level suitable for kids ages 4 to 8 (PreK, Kindergarten, 1st, 2nd and 3rd grades).

Sudoku 6x6
These 6x6 Sudoku for Kids are suitable for kids ages 6 to 10 (1st, 2nd, 3rd and 4th grades). They are designed for kids who already encounter no difficulty in completing the 4x4 Sudoku puzzles.

Sudoku Letters 4x4
These 4x4 Sudoku for Kids with letters are suitable for kids ages 4 to 8 (PreK, Kindergarten, 1st, 2nd, and 3rd grades).

Sudoku Letters 6x6
These 6x6 Sudoku for Kids with letters are perfect for kids ages 6 to 10 (1st, 2nd, 3rd and 4th grades) when the 4x4 puzzles are no longer a challenge.

Sudoku Puzzles

Sudoku
A puzzle that has taken the world by storm; fill the grid with the digits 1-9 such that no number is repeated in any column, row, or boxed section. Updates daily. Many levels - from 2x2 trivial to 9 jigsaw advanced.

Sudoku Math Puzzle
Sudoku is a fun logic puzzle! The goal is to fill a 9 × 9 grid so that each column, each row, and each of the nine 3 × 3 subgrids contain all of the digits from 1 to 9.

Sudoku 16x16
The goal is to fill the grid, so that each row, each column and each region of 4x4 cells contain all the numbers from 1 to 9 and the letters from A to G. It is also called Super Sudoku or hexadecimal Sudoku.

Sushi Sudoku
This is the classic Sudoku game with a nice sushi twist! Each row, column and tinted square set must have one and only one of each number, character or sushi piece. You can choose between practice, quick play and full course. Select either numbers, Chinese characters or sushi. Have fun!

Sudoku Variants

Killer Sudoku
The goal is to fill the grid, so that each row, each column and each region of 3x3 boxes contains all the numbers from 1 to 9. The number at the top of the first box of each dotted region corresponds to the sum of the digits of the boxes of that region. For example a region of two cases with the number 5 can be broken down into 1+4 or 2+3.

Wordoku
The goal is to fill the grid, so that each row, each column and each region of 3x3 cells contains all the letters defined for the game. Letters Sudoku is also called Wordoku , Godoku or Sudoku Word.

Sushi Sudoku
This is the classic Sudoku game with a nice sushi twist! Each row, column and tinted square set must have one and only one of each number, character or sushi piece. You can choose between practice, quick play and full course. Select either numbers, Chinese characters or sushi. Have fun!

Diagonal Sudoku
In contrast to classic Sudoku puzzles, the two diagonals of an X-Sudoku contain all numbers, too. Other names for this variation are Diagonal Sudoku, Diagonal Number Place, taikakusen nanpure, Sudoku X, Kokonotsu, or Dell’s Number Place Challenger.
Even-Odd Sudoku are Sudoku puzzles with colored even (or odd) cells. Sometimes this variante is called Even-Odd Number Place, Odd/Even Sudoku oder Guusuu Kisuu Nanpure.

Samurai Sudoku
Samurai Sudoku puzzles consist of five overlapping Sudoku grids. The standard Sudoku rules apply to each 9 x 9 grid. Place digits from 1 to 9 in each empty cell. Every row, every column, and every 3 x 3 box should contain one of each digit.

Hyper Sudoku
A Hyper Sudoku is solved by filling the numbers from 1 to 9 into the blank cells, but it has, unlike classic Sudoku. 13 regions (four regions overlap with the nine standard regions). In all regions, the numbers from 1 to 9 can appear only once.

Twin Sudoku
Twin Sudoku consists of a pair of linked standard Sudoku puzzles each with some starting digits. To get a complete solution for the twin puzzles, we have to solve each twin puzzle with the usual strategies but we can only get the complete solution for the twin puzzles by substituting the equivalent values of the digits from one twin Sudoku into the other.

Kakuro
Flex your numerical might with this daily mathematical puzzle, called Kakuro. Though the addition may be simple, the solution is anything but! Find combinations of the numbers 1 through 9 that add up to their corresponding clues. No digits can be repeated in any uninterrupted column or row. New puzzles everyday to sharpen your mind add up to endless entrancing fun!

Futoshiki
A new Sudoku and Futoshiki puzzle every day in one convenient location. Monday-to-Friday has normal difficulty puzzles while Saturday and Sunday have the weekend workout versions, much tougher puzzles to really stretch your brain.

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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