The Ultimate Challenge Sudoku Puzzle Book! Grab this massive bargain bonanza of Brand New Sudoku puzzles of varying difficulty levels, expertly crafted and ... These printable sudoku puzzles are four different levels of difficulty. You want to start with the easy ones, but if you're an expert, .Party Games: Print out the same puzzle for each participant and see who can solve it the fastest. Speed Training: Even if you find them easy, these A great set of sudoku puzzles. The aim is to fill the grid so that each row, column and box contains the same numbers, usually one to nine.