The nine boxes are irregular shapes. Each row, column and shape holds the digits 1 to 9 one time. Fill the grid as fast as you can.
Your best – 3 mistakes end the run
or press Space
Type a digit in the selected cell. N notes, Z undo, Backspace erase
Rules & what counts
Jigsaw Sudoku: Play Free Online
In Jigsaw Sudoku the nine boxes are irregular shapes of nine cells, drawn with thick lines. Each row, each column and each shape must hold the digits 1 to 9 one time.
The shapes change with every puzzle. A puzzle starts with 28 to 32 digits.
The server deals a new puzzle for every run and keeps the answer. Every puzzle has one solution. Your result is your time to the last correct digit.
How to play
Select Start. The clock starts when the grid shows.
Look at the shapes first. A shape can cover parts of four rows and four columns.
Click or tap an empty cell, then a digit on the number pad. On a keyboard, type the digit.
A wrong digit turns red and counts as a mistake. The third mistake ends the run, and the run is not saved.
Select Notes to write candidates in a cell. Select Erase to clear a cell, or Undo to take back the last entry.
What counts in this quiz
Your result is the time from the moment the grid shows to the moment you enter the last correct digit.
On the leaderboard, a shorter time ranks higher.
A run that ends with three mistakes is not saved.
What's not included, and why
The clock does not stop when you leave the page or change tabs.
There are no hints.
A run under 90 seconds is not saved.
Good to know
Jigsaw Sudoku is also called Irregular Sudoku, Squiggly Sudoku or Nonomino Sudoku. It is a regular puzzle at the World Sudoku Championship.
The law of leftovers: take a row and the shape that sticks out of it. The cells of the shape outside the row hold the same digits as the cells of the row outside the shape.