About Sudoku: Fill a 9×9 Grid with Numbers 1 to 9

Sudoku is a classic number puzzle built around a 9×9 grid of 81 cells, divided into nine smaller 3×3 squares. At the start of each game, some cells already contain numbers from 1 to 9, and the challenge is to fill every remaining cell so that each digit from 1 to 9 appears exactly once in every row, every column, and every 3×3 square. Several scenes show a grid populated with black and dark-blue digits against white, light-blue, and yellow square backgrounds. Multiple difficulty levels are available to choose from, and mistakes are something to watch out for as you work through the puzzle.

How to Play Sudoku

Select any empty cell by clicking on it, then click the number you want to place there. When you are not yet certain of a number, the Notes button lets you mark candidate digits in a cell without committing to a final answer. The goal is to complete the entire 81-cell grid so that every row, column, and 3×3 square contains each digit from 1 to 9 exactly once.

Controls

• Click on a cell: Select the cell you want to fill
• Click on a number: Place that number in the selected cell
• Click the "Notes" button: Mark possible numbers in a cell without placing them

Games You Might Like

If logic and number puzzles keep you coming back, the educational games collection on Playgama has plenty more to explore. Number Match - Classic number game is a logical number puzzle where you find identical pairs or pairs summing to 10, making it a natural companion for Sudoku fans. For word-based brain training, Crosswords: Big Collection delivers over 800 levels and a daily crossword that refreshes every day. Word Search sharpens observational skills by hiding words inside a letter grid, a satisfying shift from number logic. Crosswords 2026 adds a tile-drawing mechanic where holding no more than 8 tiles at once keeps every move focused and deliberate.

Browse the full puzzle games category for more grid-based challenges, or head to number games for titles that put numerical thinking front and center.