This is a reincarnation of the SudokuMaster2000 with the main difference that this one can solve puzzles the human way, meaning that it generates classical sudoku puzzles that have only one logical solution.
#Edit: I have uploaded a newer version with the following features:
- A short tutorial file illustrating basic solving methods that can be viewed in the program (unconventionally in the Actions menu
- Possibility to enter digits as "candidates" for a given cell.
- Updated help files.