qqwing

QQwing is a Sudoku puzzle generator and solver. It offers the following features.

Fast. It can solve 1000 puzzles in 1 second and generate 1000 puzzles in 25 seconds.
Uses logic. Uses as many solve techniques as possible when solving puzzles rather than guessing.
Rates puzzles. Most generators don't give an indication of the difficulty of a Sudoku puzzle. QQwing does.
Can print solve instructions. Tells steps that need to be taken to solve any puzzle.
Customizable output style. Including a CSV style that is easy to import into a database.


          

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License: GPL-2.0-or-later
URL: http://ostermiller.org/qqwing/