iSudoku 3.0.1 Not only a puzzle creator and solver, but a great tutor to help you quickly master sudoku skills. It can automatically generate five different levels of puzzles and supports a powerful hint system with two sets of techniques to help you when needed.
My SUDOKU 1.62, The Game From Endless Time In 1849, prominent mathematician Leonard Euler published his work «De quadratis magicis» («On magic squares»), describing properties and construction of «squares of digits» with special constraints for sum by rows and columns. In 1979, American architect Howard Garns published in Dell Magazines a puzzle called «Number Place». In 1986, Japanese puzzle publisher Nikoli republished Garns puzzle