Scratch Sudoku Change the "Insert Number" slider and click an empty square to fill it with that number. Change slider to "0" to draw notes on the board (hold space bar while drawing to erase scribbles). Game ends when you complete the grid or make five wrong guesses. Individual games are stored graphically as arrays as demonstrated by Roberth. Each game is a separate costume within the Games sprite (2 9x9 arrays side-by-side -- the first one color coding the numbers, the second one coding the blanks). Games can be added by creating new costumes.
