This is an example of a Jigsaw Sudoku. The rules of Jigsaw Sudoku are,
- Each row must contain the numbers 1-9 once, and only once.
- Each column must contain the numbers 1-9 once, and only once.
- 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.
Jigsaw Sudoku leaderboard
How to play
