Sudoku Collection: 200 Easy Outside Sudoku Puzzles 9x9 - Paperback
Sudoku Collection: 200 Easy Outside Sudoku Puzzles 9x9 - Paperback
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by Alena Gurin (Author)
Outside Sudoku is a variation of the standard sudoku. Some digits are given outside the grid. These digits must appear in the first three cells in the corresponding direction.