The most popular logic puzzle in Japan. It is very simple to learn, requires no calculations, and provides a surprisingly wide variety of logic situations. The rules are simple. Each row, column and minibox comprises the numbers 1 through 9. The solver must complete the missing numbers. So the completion rules are so simple and yet the overall task can be difficult. Sudoku is recommended by some teachers as an exercise in logical reasoning.

Sudoku16 is complicated version of sudoku game destined for real puzzle lovers. It`s also known as Suduko, Sudoko, Su do ku, Sodoku, Suduku. In it you must to compare numbers on game board to make them according the rules. Which are very simple. Each row, column and subgrid inibox (4x4) comprises the numbers 1 through 16 or letters A through P or anything else. From children to old can enjoy it for a pass-time.