About

Hodoku Revisited is a TypeScript port of HoDoKu, the Sudoku generator, solver and trainer by Bernhard Hobiger (2008-2012). HoDoKu has not been updated since 2013 and runs only as a Java desktop program. This project brings its solving engine to the web and mobile with a new interface.

Accuracy

The solver was ported technique by technique. Its output is tested against the original program: hundreds of puzzles are solved with HoDoKu 2.2.0, and the new engine must find exactly the same steps, in the same order, with the same score and difficulty rating.

License

Hodoku Revisited comes with ABSOLUTELY NO WARRANTY. The code is free software under the GNU General Public License, version 3 or later, as the original. You may use, study, change and share it under those terms. The complete source code is at https://github.com/ntropey/hodoku_revisited. Changes to the original code are marked in the file headers.

Hodoku Revisited is not affiliated with or endorsed by the original author. The technique guides and the user interface are new texts and designs and are not taken from the HoDoKu manual.

The puzzle generator follows the approach of HoDoKu; thanks to Michael Fowler's generator ideas credited there.