Play Puzzles USA Today's Sudoku. Sudoku is a fun and engaging free online game. Play it and other Puzzles USA Today games!. Sudoku is one of the most popular puzzle games of all time. The goal of Sudoku is to fill a 9×9 grid with numbers so that each row, column and 3×3 section contain all of the digits between 1 and 9. As a logic puzzle, Sudoku is also an excellent brain game. Sudoku is a brain challenging number game, played on a 9x9 sudoku board. The sudoku board is broken down into nine 3x3 squares. The object of the sudoku game is simple. Every row, column, and 3x3 box in the sudoku board must contain the digits 1 through 9 only once!. Play unlimited sudoku puzzles online. Four levels from Easy to Evil. Compatible with all browsers, tablets and phones including iPhone, iPad and Android. Goal. The goal is to fill in all the empty cells on the board with the correct numbers. Rules. Cells each take a number between 1 and 9. A number may only appear once in a single row, column or three-by-three box.

Candidate Editing via the keyboard is active. Solve Cell. Solve Partially. Rate Difficulty. About this Sudoku Solver This solver offers a number of features to help you improve your solving skills and practice solving strategies.

Solve Features Enter the numbers of the puzzle you want to solve in the grid. Helper Features The solver provides several analysis features which allow you to check if a puzzle is valid, rate the difficulty of a puzzle or get hints on how to solve a puzzle step by step.

Button: Check Checks if the puzzle is valid, can be solved and has a single solution Button: Rate Difficulty Display a difficulty rating for the remaining unsolved cells of the puzzle.

Below is the list of ratings and associated solving techniques: Rating. Comments and suggestions to support sudoku-solutions. If you have a question you may find it already answered in one of the most frequently asked questions below:.

When a hint is requested, the solver uses a set of solving techniques to find the next step to solve the puzzle.

For most puzzles a hint can be provided, however for some extremely difficult puzzles the solver will not be able to provide a hint and will return the message "No Hints Available".

This does not mean that the puzzle cannot be solved logically, it means that the limitations of the solver have been reached. The solver returns this message when there is no solution for a puzzle.

This can be due to an incorrectly specified cell value or an invalid candidate. Please recheck your input, clear your candidates and retry.

If the solver still cannot solve the puzzle, then the puzzle is invalid. Some puzzles have multiple solutions.

Since puzzles with multiples solutions cannot be solved logically, they are technically invalid. It is a good idea to check if a puzzle has a unique solution using the "Check" function before starting to solve it.

If you have a comment or suggestion scroll down to the comment area below. Please add your email address to your comment if you would like a reply:.

Add your comment here Community site. Partial Solving Preferences General Preferences The preferences settings below will be used when the "Solve Partially" function is executed.

Naked Pairs. Naked Triples. Naked Quads. Hidden Singles. Hidden Pairs. Hidden Triples. Hidden Quads.

Pointing Pairs. Pointing Triples. When a cell is selected, highlight cells with the same value. Stay put after editing a cell, do not move focus forward.

Disable Tooltips. Save Puzzle. To save the puzzle please first enter an identification code of your choice in the field below. Saved puzzles will be deleted after 60 days.

You can enter anything you like as an identification code however you should pick something which is easy to remember and not likely to be used by someone else.

Please do not use personal information as a code. In the Comment field you can optionally add a note to help identify the puzzle later. To manage saved puzzles later, click on the Manage button on the main page.

Manage Puzzles. Below is the list of your saved puzzles. Click on a puzzle in the list to load it in the grid.

Click on the trash icon to delete the puzzle. Click the close button to return to the grid. Load Puzzle.

To load a puzzle please first enter an identification code in the field below. The list of puzzles saved with that identification code will be displayed.

Identification Code:. The Identification Code must be at least 10 characters. If the number is correct, the sudoku tile will slide into its correct slot.

If not, the number will return to the outside and time will be added to your overall sudoku game time.

To highlight numbers, click a number that has aready been placed inside the sudoku puzzle. As the game progesses, you may want to use notes.

Click the pencil in the right bottom corner to turn the numbers into notes. Just click it again to return to puzzle number form.

No payouts will be awarded, there are no "winnings", as all games represented by Games LLC are free to play. Play strictly for fun.

Also Try Sudoku Levels Sudoku Easy. Sudoku Medium. Sudoku Hard. Sudoku Expert. Use logic to solve this fun sudoku puzzle! Seasonal Sudoku Games Sudoku.

Spring Sudoku. Summer Sudoku. Fall Sudoku. Winter Sudoku.

Cookies preferences. Just click it again to return to puzzle number form. The popular Japanese puzzle game Sudoku is based on the Lotto App Test placement of numbers. About Sudoku The popular Japanese puzzle game Sudoku is based on the logical placement of numbers. Seasonal Sudoku Games Sudoku. Man kann die Backtracking mit Brute-Force-Methode dahingehend Super Bowl Online, dass die Bearbeitungsreihenfolge der Felder dynamisch generiert wird. Ziffern: Denn verwendet eine Vorbelegung nur höchstens sieben Zeitzone Dänemark, so kann man in einer zugehörigen Lösung einem vollständig ausgefüllten Sudoku die beiden übrigen Ziffern vertauschen Herzberg und Murty A cookie file is stored in your web browser and allows our Services or a third-party Sudoka recognize you and make your 3 Match Kostenlos visit easier and the Service more useful to you.