Sudoku helper actually tries to teach you the methods instead of just giving an answer. The program will highlight cells which can be used to derive the step in the puzzle. The puzzle has a timer and an undo feature. You can save multiple games at multiple positions in the puzzle. There is also candidate manipulation which is great for advanced players.

Features:
1. Single Naked
2. Doube Naked
3. Triple Naked
4. Four Naked
5. Five Naked
6. Single Hidden
7. Double Hidden
8. Three Hidden
9. Four Hidden
10. Five Hidden
11. Single Row
12. Single Column
13. Double Row
14. Double Column
15. X-Wing 2x2

The license of this software is Freeware, you can free download and free use this sudoku game software.