Regions Sudoku has the same basic rules as regular Sudoku. The numbers 1 through 9 appear exactly once in each horizontal and vertical line. Whereas in regular Sudkoku the numbers 1 through 9 also appear exactly once in each square 3x3 grid, in Regions Sudoku the grids are irregularly shaped but still contain the numbers 1 through 9 exactly once.200 Easy Regions Sudoku Puzzles in a handy and convenient 9" x 6" format.All the solutions are at the back of the book.
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