Fill in the Sudoku grid using these simple rules. Each of the nine blocks has to have all the numbers 1-9 inside of its squares. Each number can only appear once in a row, column or box of nine squares. You can use up to five hints to help you solve the grid. Play Master Sudoku online on your mobile phone, tablet or computer.
Use the mouse to click or touch an empty square, then select a number from the bottom to place it in the square. The number will turn red if it is in a row, column, or box that already contains that number. If you need to erase a placed number, select the number and then click the X at the bottom.
This free online game was built with HTML5. It runs on Chrome, Firefox, Opera, Safari or Internet Explorer 9 or higher. Play Master Sudoku unblocked on any device. Master Sudoku online is optimized for use on PC, Android and iOS devices, including tablets and mobile phones. This game runs directly in your browser - no downloads, no registration, no flash and no plugins are needed to play.