Sudoku is a puzzle with numbers, which is became very popular during last years. It is a Japanese game and also known as a Latin square. Gaming field is a square 9x9 dimension divided into 3x3 blocks. Rules are quite simple: you need to fill in the cells by numbers from 1 to 9 so that in column and in block each number was there only once. All-Time Sudoku is a real Sudoku game. The difficult of the game depends on how many cells are filled up. In this game you can choose the difficult. If you are just a beginner, it is better start with easy mode. Train your main muscle – brain and show us that you are a genius!