Description:Challenge is the name of the game with Sudoku Challenge! This is a classic Japanese Sudoku number game. Fill in the fields with the numbers from 1 to 9 but make sure you donít repeat any number in any 3x3 box, row or column in the playing field. Sudoku Challenge is played by the classic Sudoku rules; most puzzles will take from 10-30 minutes depending on your skill or experience. Test your logic and your skill with this classic Sudoku game, there is only one answer to each puzzle. Enjoy!