A standard Sudoku with numbers and a choice of Wordoku with letters
Pros & Cons:
If you need more varieties, Isanaki Sudoku is a good choice. Not only has it had a standard Sudoku mode, it allows you to switch over to a Wordoku mode easily, entering letters instead of numbers.
The program has 6 levels of difficulty, equipped with a generator and a solver using the brute-force technique and solving most of the hard Sudoku boards. It provides optional 9x9 or 16x16 boards which are configurable by users, but certain buttons in the 16x16 board go beyond the window if not maximized.
Other useful features include hints, redo/undo moves, show mistakes, highlight candidates, print multiple boards, saving and opening, import and export, plus a simple sound effect.
After downloading the zip file, extract it and run the executable directly.
Isanaki Sudoku was reviewed by Jojo Yee on