Sudoku

Rules of sudoku

Enter a numerical digit from 1 through 9 in each blank cell of the Sudoku grid. Be carefull : Every row, every column and every square must contain only one instance of each numeral.

History of sudoku

The modern Sudoku was designed by Howard Garns in 1979. The puzzle was introduced in Japan by Nikoli in 1984. In 1997, Wayne Gould developed a computer program to produce puzzles and promoted it in British newspapers. Find more details in Wikipedia