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Tue, 17 Sep 2019

What are the rules of Extra Region Sudoku?

Extra regions is a generic term for a sudoku puzzle that has more than the standard 27 regions of ordinary sudoku.

There are therefore many many different types of extra region sudoku; the rules are the same as normal sudoku but you need to apply them to every extra region added to the puzzle.


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What strategy tips will help me solve Extra Region Sudoku puzzles?
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