4th of July Fireworks Director Sudoku4th of July Fireworks Director Sudoku is an addicting and fun matching game that will test your ability to problem solve, despite its simple design. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid which contains all of the digits from 1 to 9. Sounds simple? It's not! FEATURES Sudoku is played over a 9x9 grid, divided to 3x3 sub grids called "regions" The game begins with some of the grid cells already filled with numbers The object of Sudoku is to fill the other empty cells with numbers between 1 and 9 A number can appear only once on each row, each column and each region Work row-by-row or side-by-side, keeping yourself organized It's all about delicate planning and execution Easy to learn, hard to master