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Samurai Sudoku
Learn Samurai Sudoku: five overlapping 9×9 grids that share corner boxes, played as one giant interlocked puzzle.
Samurai Sudoku is the giant of the family: five overlapping 9×9 grids arranged in a plus shape, where the central grid shares its four corner boxes with the four outer grids. Each of the five grids follows ordinary Sudoku rules.
The shared boxes are the whole point — a deduction in one grid ripples into another through the overlap, so you are constantly switching attention between sub-grids. It is a long, absorbing solve.
Samurai needs a multi-grid renderer and coordinated solving across the overlaps, so it is the largest variant to build and sits last on the roadmap.
Rules
- Five 9×9 grids, each following all classic rules.
- The central grid shares its four corner boxes with the outer grids.
- Overlap cells must satisfy both grids they belong to.
Frequently asked questions
What is Samurai Sudoku?
Five overlapping 9×9 Sudoku grids joined at the corner boxes, solved together as one large puzzle.
How big is a Samurai Sudoku?
It spans a 21×21 footprint of five interlocking grids, with the centre sharing boxes with each of the four arms.
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