Each edition of the Hard 16x16 Number Sudoku series contains 60 computer-generated Sudoku with 16x16 fields. The 16x16 Sudoku puzzles are asymmetric Sudoku with 100 predefined numbers from 1 to 16; the level of difficulty is hard . Each 16x16 Sudoku puzzle takes up a full page so that there is enough extra space within the box to write smaller, optional solutions as you work through the puzzle. All puzzles can be easily solved by excluding numbers by process of elimination from other columns, rows, or boxes, and have only one possible solution at a time. This book contains solutions as well as general game instructions for each of the 60 puzzles.