Sudoku is a logic puzzle played on a 9x9 grid, divided into nine 3x3 boxes. The goal is to fill the entire grid with numbers from 1 to 9, ensuring that each number appears once in every row, column, and 3x3 box. Some cells already contain numbers to start, serving as clues. Players should use strategies like elimination and spotting single possibilities to place numbers correctly. The puzzle is solved when all cells are filled without any rule violations. Difficulty varies, but all solutions rely on logical deduction, not math.
Touch or click on an empty slot on the game board. After you have your slot selected, touch or click on the number tile to place it in the empty slot you previously selected. You can touch or click on the numbers in the game board as well. If you are stuck and could use some help, the light bulb is ready to provide you some clues! Click it after selecting an empty slot to get your clue.