Hexdoku

Impossibly hard*, 100% real 256x256 Sudoku puzzles.  Beautifully printed on a larger 21"x21" metal canvas for your wall decor. With more that 65,000 number cells, and more than 13,000 cells open for solving, a Hexdoku is considered impossible to solve by hand.  The higher cells make for higher resolution graphics and photo reproduction.  Unlike the 100x100 Walldoku products, a Hexdoku uses Hexadecimal numbers where  each row, col, and sub-block has one of every value from 00-FF.  Like all Walldoku products, you can Personalize a Custom Hexdoku with a picture of your choice.  Creating a visually stunning wall hanging, and an intellectually shocking Sudoku puzzle. As a Sudoku fan, you can display this unique conversation piece on your favorite wall, or gift one to the Sudoku enthusiast in your life. *Hexdoku puzzles are considered impossible to solve by hand and do not come with paper printouts to aid with solving.