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.

25000 sudoku puzzles classified with 9 difficulty levels are available online. Hints can be shown by running kaidoku with pyodide.

https://sekika.github.io/kaidoku/sudoku

Document is availabe in English and Japanese.

https://sekika.github.io/kaidoku/

• Naked single, pair, triple and quad
• Hidden single, pair, triple and quad
• Pointing pair and triple
• X-wing family (Swordfish and Jellyfish)
• XY-wing and XYZ-wing
• Remote pairs
• Chain of pairs
• Trial and search