Explanation:
First of all, you might want to take a look at this:
Okoker Sudoku 4.1 | Webmasterunit.com
Okoker Sudoku Pro delivers has for decades been the most challenging, intriguing and entertaining puzzles. The solutions are unique and can only be found with logical thinking - gambling does not work. Fill out the figures of 1-9 in the empty boxes. In each row, column and 3x3 square, a figure only once. * Play at different levels. * Discover the simplest method to-Sudoku puzzles to solve. * Train your brains and stay sharp. * It is also fun: do it once and you're addicted! In the free trial version are some features disabled. For Windows 98, ME, NT, 2000, XP, Server 2003 & Vista.