# Introduction

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Sudoku Assistant does not solve or generate sudokus. Instead, it helps you solve existing puzzles publshed elsewhere as follows:

- Once the puzzle has been set up it displays the possible numbers in other empty cells as
*hints*. - It removes these hints once another cell in the same row, column or box has been confirmed.
- It highlights clashes where the wrong value has been selected for a cell.
- It's now written in JavaScript (the original Java applet has finally now been retired now that Java is no longer supported in most browsers).

To use it:

- First of all, find yourself a sudoku puzzle you want to solve.
- Click on the appropriate small number in a cell to set the cell to the number from the puzzle.
- Once the above is complete, click the
**Fix**button. This will make those numbers unchangeable so that they can't accidentally be changed. - Click the
**Number Fill**button to show which numbers can possibly fill the unused cells. Alternatively, right-click each small number manually to show which numbers can possibly fill a cell. The small numbers will toggle between their faded and normal states when you right-click them. - Now solve the puzzle by clicking the small numbers.
- Hovering the mouse over a small number highlights all occurrences of that number in red, which may locate places where that number only appears once in a row, column or cell.
- Any cell that only has one usable number remaining will be highlighted in green.
- Any cell where all the usable numbers have been used up with be highlighted in yellow - this indicates that at least one other large number is not in the right place.
- The
**Clear Non-fixed**button will remove any numbers that are not part of the original set of start (fixed) numbers. The**Clear All**button will remove all the numbers. Both buttons will ask for confirmation before they wipe out the game.

Go to the next page to start using it.

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