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| Jigsaw Sudoku Solver |
Please report any bugs. Tested in IE, Firefox, Safari and Chrome Feedback: Form and User Comments/Questions Here |
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Quick help: The differences
Jigsaw Sudokus are the same as normal sudoku except for the shapes of the boxes. Some strategies cannot be used (see below) but there is one important addition: The Law of Leftovers. In order to use this solver you need to pick the correct grid shape from the list above. Only then type the numbers into the small grid, use the Import button or pick an example from the example list. There are 20 Jigsaw shapes as used on www.sudoku.org.uk and four interesting examples for each shape, 80 examples in total. For all other help guides for the solver, see the Sudoku Solver. |
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Welcome to my Jigsaw Sudoku page I am pleased to reveal this latest Sudoku Solver - one for Jigsaw sudokus. In many ways Jigsaw's are even more interesting than normal sudokus, although they have not been studied as much. All bar a few of the strategies pertain to Jigsaws, but in the current version I have removed Uniqueness tests until I can check the algorithms more properly. However, you will rarely need an extreme strategy since they are often defeated using no more than Pointing Pairs and Box/Line Removal - simple because the shapes of the boxes lead to more opportunities for these strategies. Also, the Law of Leftovers is an excellent candidate eliminator. Documentation on this to follow. |
All feedback, comments, arguments, bug reports and strategy ideas are welcome. There is a new FEEDBACK form with a column displaying comments and questions. Many thanks to all the people who have done so and helped improve this solver. Latest version 1.86 (July 16th 2012) Updated the basic strategies to report more clearly, adding green candidates for those numbers that cause other candidates to be removed. Brought it into line with the Sudoku solver. Latest version 1.85 (May 12th 2012) On the small board for number entry I have added an option that automatically clears off candidates as numbers are added. Also, changes to the small board are automatically saved. New in version 1.79 (June 21st 2011) Added some new 'shape' patterns - see the end of the example pull down list. These are used in the new Jigsaw Sudoku Puzzle Packs. The examples here are gentle, moderate, tough and extreme - four each for each new shape pattern. Version history here New in version 1.38 (November 21st 2006) Release of the Jigsaw Solver |
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