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Instructions:

This is a Sudoku puzzle solver and generator. To solve a puzzle, put in the numbers you know and click the "solve puzzle" button. To generate a new puzzle randomly, click the "generate easy" or "generate hard" buttons. All puzzles generated have a single unique correct solution. To clear the board, select "erase board".

The solver/generator code is written in C and available here if you are interested.

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index.cgi was last updated 3 July 2016 and is Copyright (C) 2002-2015 by Scott Gasch (scott.gasch@gmail.com).