This software tests how quickly users can solve a popular number puzzle.

In this particular version of the game, your task is to fill in a 9x9 grid with numbers ranging from 1 to 9. Each row, column, and 3x3 square on the grid must contain each number exactly once. Some spots on the grid will already be filled in for you, but others will be blank.
To fill in the blank spaces, simply click on the number pad located on the left-hand side of the screen. Only valid numbers can be placed, so you don't need to worry about making a mistake that isn't fixable. If you do accidentally fill in a wrong number, it's easy to erase it by clicking on the cross button at the bottom of the number pad.
If you're feeling stuck and unsure how to proceed, there is a handy Hint button located below the grid. Clicking it will reveal one of the answers, but be aware that each hint adds 50 seconds to your overall playtime. Time is tracked at the top left corner of the screen, so use hints sparingly if you're trying to climb to the top of the leaderboard.
Overall, this version of Sudoku is a great way to test your logical thinking skills while having fun. See how quickly you can finish the puzzle and challenge yourself to beat your high score.
Version 1.7.1: Added 4 language versions