# Daily Jigsaw Sudoku Puzzle (Hard)

SCORE:

## How to play

This is an example of a Jigsaw Sudoku. The rules of Jigsaw Sudoku are,
1. Each row must contain the numbers 1-9 once, and only once.
2. Each column must contain the numbers 1-9 once, and only once.
3. Each sub-region must contain the numbers 1-9 once, and only once.
These rules are very similar to the normal Sudoku rules, but where in a normal Sudoku puzzle each region is a 3x3 square, they can be any shape in a Jigsaw Sudoku puzzle. There will always be 9 squares, but they could be any shape.
This particular puzzle has a 3x3 square in the middle, but all the other regions are a non-square shape.
We can work out the value of the highlighted cell in this puzzle. We know that the top-middle region must contain the number '1' somewhere. We can also see that the other three empty cells can't contain a '1' as those columns already have a '1' in them. So, the highlighted cell must be '1'.
We have used exactly the same techniques as we would normally, it's just the region aren't a regular 3x3 square.
Can you work out the value of the highlighted cells using the techniques you already know? You can fill these in right now without needing to know any more of the puzzle.
This page will automatically load the puzzle for today. If you want to play a different puzzle, go to the archive page and choose your puzzle.
There are two ways to play a Sudoku puzzle, you can just use the mouse/touchscreen, or you can use the mouse and keyboard. You can switch between the two methods any time you like, and can use a combination of both.

### Playing with a mouse/touchscreen.

• When you have found a square where you can enter a number, click/touch that square. The square will turn light blue.
Above and below the puzzle is the number selection. Click/touch the number you want to enter in to that cell. If there is already a number in that square, it will be over-written.
• If you want to enter a pencil mark, click/touch the square you want to put in a pencil mark. It will turn light blue. Click/touch the pencil icon above or below the puzzle. This icon will turn light blue, and you are now in pencil marks mode.
Whenever you click/touch a number now, a pencil mark will be put in the square instead. To remove a number as a pencil mark, make sure you are in pencil marks mode, and click/touch the number again.
You can exit pencil mark mode by clicking/touching the pencil icon, it will turn back to normal.
• If you want to clear a particular square, make sure that square is selected and is in light blue. Click/touch the eraser icon. If there is a number in that square, it will be removed. If you click/touch it again, any pencil marks in that square will be removed.

### Playing with a mouse and keyboard.

• You will need to select a square by clicking on it with the mouse, it will turn light blue. You can change the current square by using the cursor keys on your keyboard.
• To enter a number, press that number on the keyboard. If there is already a number in that square, it will be overwritten. To remove a number, press the backspace or delete key on your keyboard.
• To enter a pencil mark, press control, shift, or alt on your keyboard at the same time as pressing a number key. Do the same thing again to remove that pencil mark.
Any mistakes you make will be hilighted in red. The website will know when you have completed a puzzle and will tell you. If you have an account and are logged in, the website will remember that you have completed that puzzle. You will also take part in out leaderboards. It's free to create an account!