Kaidoku: Player, solver and creater of sudoku puzzles

Kaidoku can solve sudoku puzzles as shown in the figure, play with the puzzles and create sudoku puzzles with a command-line interface.

Kaidoku is a

player of sudoku. You can play original sudoku puzzles of various level of difficulty with command line interface. You can get hints when you want.
solver of sudoku. It can solve a sudoku puzzle and show the procedure of solving a sudoku puzzle with various logics. It evaluates if a given puzzle is valid sudoku with unique solution.
creater of sudoku. It can create new sudoku puzzles. The puzzles shipped with this program was created by the program itself.

Online player

Sudoku puzzles with various dfficulty levels are available online. Hints are available.

Document is availabe in English and Japanese.