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Extra Region Sudoku example
Extra Region Sudoku logic puzzles

Also known as: Windoku, Hyperdoku

Sudoku Extra Regions is pretty much what it sounds like - a regular Sudoku puzzle (a square grid with bold lines every third square in order to sub-divide it into nine 3 by 3 boxes) but with the addition of a varying number of additional regions.

The aim is simple: place the digits 1 to 9 into the puzzle grid so that each digit occurs once in every row, column, bold-lined 3 by 3 box and each of the marked extra regions.

The given digits in the puzzle define the puzzle in such a way that there is only one single solution, which can be reached via reasonable logical deduction. Guessing is never needed!

The extra regions constrain the puzzle more than a regular Sudoku, which means that less given numbers are needed. As a result the puzzles can look particularly artistic, with small and neatly-clustered arrangements of givens.

We can supply Sudoku Extra Regions puzzles at almost any size and with some additional variations, such as Jigsaw regions instead of the regular 3x3 boxes.

All of our puzzles are either entirely hand-made or have significant manual input into the process.

Related Sudoku variations (click for details and samples):
Sample Extra Region Sudoku puzzles (click to view press-ready PDF version):
Sudoku 5 Extra Regions
Sudoku 5 Extra Regions
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