Su-Doku

If you are a Sudoku enthusiast, you would love the free and open-source Java implementation of Sudoku - Judoku. This visually attractive and interactive software comes with intelligent and brute force solving strategies that will help you solve even the most challenging puzzles with ease.

One of the best features of Judoku is the options it gives you for solving a puzzle. You can either select one of the predefined puzzles and let the applet solve it for you, or you can clear the playing field and use your mouse to copy one of your own puzzles and then see it getting solved. If you prefer, you can also use the 0-9 keys and the cursor keys to navigate.

With a simple press of your mouse button or the keys, you can enter a value between 1-9 or clear the cells. Moreover, Judoku has an 'Optimization' option and a slider on the right that you can use to speed up the solving process.

Perhaps the most critical aspect of Judoku is that you can easily store (save) and later restore (load) your possibly partially solved puzzles. This way, you can resume solving a puzzle later from where you left off.

In conclusion, Judoku is a fantastic software that any Sudoku fan should try. Its interactive nature, solving strategies, and puzzle storage feature make it a must-have for every Sudoku enthusiast.