The book contains Greater Than Sudoku (also called "Compdoku") puzzles 9x9 at the level of Very Hard. All riddles have only 1 solution. 2 puzzles per page.The font size is correct you will not have to strain your eyes when solving puzzles. Wide inner margins making will allow you to take notes. It will be easier to work on the puzzles.High quality paper and print (all puzzles read well, easy to write with pen and pencil without worry of bleed-through). Greater Than Sudoku is the variation of the original sudoku. In addition, greater than or less than signs (">" or "
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