The Game consists of a field with 3x3 blocks, that are subdivided in 3x3 Fields , all in all 81 fields in 9 rows and 9 columns. The aim of the game is to fill up the empty fields of the puzzle in that way, that in every one of the 9 rows, columns, and 3x3 blocks every number from 1 bis 9 occurs exactly one time. Sudokumat is a software that allows to easily create and solve sudokus of different levels of difficulty. It is possible to create your own "pdf-sudoku-book" with as many sudokus as you want. Sudokumat solves every sudoku within milliseconds.