Free Sudoku offers billions of Sudoku puzzles online on 6 levels for children or experts. Play the most recent sudoku shared by the free- ruchocice.eu surfers. Sudoku (数独, سودوكو) is a challenging online number puzzle game designed for player of all ages. Basically your target is to fill all blank cells with a number. Sudoku is one of the most popular puzzle games of all time. The goal of Sudoku is to fill a 9×9 grid with numbers so that each row, column and 3×3 section.