100 different Sudoku puzzles in five difficulty degrees: from very easy to very hard. The rules for solving a Sudoku are simple: each row, column and region must contain the numerals from 1 through 9 exactly once. The puzzles are in Adobe PDF file format and don't need to be installed. You can print them and work out with pencil and paper.
||Windows 95/98/Me/NT/2000/XP/2003 Server