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The Original Sudoku Calendar is on the up-and-up. Because these puzzles, printed in lively full colour, are simply the best you'll find anywhere. From Nikoli, the Japanese publisher that invented Sudoku, they are completely handmade which means every puzzle is like a mind game between you and its creator. Nikoli's grids have an elegance that computer-generated puzzles don't; they strike the perfect balance of challenge and solvability. The calendar features easy puzzles each weekend, with progressively more difficult ones over the course of the week.
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Book Description Workman Publishing Company, 2008. Calendar. Condition: New. Pag. Seller Inventory # DADAX0761149929