Sudoku by TreSensa

Fill in the blank cells so that all numbers 1-9 are used once in every row, every column, and every sub-grid of 9-squares, called a region. Click or tap on any number on the right, then click or tap on the empty cell where you want to place that number. Earn points for correct placement of numbers; lose points for mistakes. If you incorrectly place a number, it will be red. To remove a number that you placed, click or tap on it and press Clear. Choose Hint to find out which number goes in the cell. Choose Pause for the following options: Resume, Restart, Main Menu, Instructions, and Sound control.

A number should only appear once in every row, every column, and every region. Use the timer to see how quickly you can solve the puzzle! Try all the levels for multiple mind-bending challenges!

HTML5 game you can play on both mobile and desktop
Choose from Easy, Medium and Hard levels
Use hints if you get stuck
Improve memory, increase mental capacity, and keep your mind sharp!