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 Windoku Solver Please report any bugs. Tested in IE, Firefox, Safari and Chrome. Feedback: Form and User Comments/Questions Here
Candidates can be Edited or Highlighted / Shown
Enter clues or solutions
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 Check for solved cells Show Possibles 1: Singles 2: Pairs 3: Triples 4: Quads 5: Pointing Pairs 6: Box/Line Reduction Tough Strategies 7: X-Wing 8: Simple Colouring 9: Y-Wing 10: Swordfish 11: XYZ Wing Diabolical Strategies 12: X-Cycles 13: XY-Chain 14: 3D Medusa 15: Jellyfish 16: WXYZ Wing Extreme Strategies 17: Grouped X-Cycles 18: Finned X-Wing 19: Finned Swordfish 20: Altern. Inference Chains 21: Sue-de-Coq 22: Digit Forcing Chains 23: Nishio Forcing Chains 24: Cell Forcing Chains 25: Unit Forcing Chains 26: Almost Locked Sets 27: Death Blossom 28: Pattern Overlay Method 29: Quad Forcing Chains "Trial and Error" 30: Bowman's Bingo

 Show bi-value cells Show Strong (bi-location) links in Boxes Rows Columns 1 2 3 4 5 6 7 8 9

Please report any bugs - Thanks.

If you are getting errors please
to retrieve the latest script files.
 Auto Tab Auto Clear
Clues+Solved: 0/81
 Pick an example here Easiest Windoku Gentle Moderate Tough Diabolical Moderate 14 Clue Densest Clues Naked Triples Pointing Pairs LBR examples Y-Wing examples XYZ Wing Swordfish X-Cycles XY Chains 3D Medusa Jellyfish Crazy Extreme

Quick help: Using this Solver

Use the "Import a Windoku" button or type in a Sudoku puzzle in the small board. You can also pick examples from the list above.
Click on Take Step to step through the solution. Unknown squares are filled with 'candidates' - possible solutions.
Any cells that are reduced to one possible candidate are solved.

You can now use the << button to step back one go. Toggling between Take Step and << helps you see the changes.

Pressing "Enter" on the keyboard after clicking on Take Step is a quick way to activate "Take Step". Details of any solutions will be written out in the text box below the big board. Strategies are ordered by complexity. Any strategy that is successful returns the step-through to the start.

Click on the board to highlight sets of numbers. You can edit the sudoku at any time - entering solutions in the small board or editing candidates. (Toggle between highlighting and editing using the radio buttons at the top).

 A B C D E F G H J
Version 2.06
See Strategy Overview documentation

Coordinate system: Letter/Number rYcX

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## Welcome to my Windoku page

A brand new solver for the Windoku Sudoku variant.

Quite a few people have asked me to add this so I'm very pleased to get this finished at last. May be knock on bugs with the other solvers, do let me know.

Version 2.05 (March 26th 2016)
Expanded Windoku to take advantage of all nine 'windows'
See Windoku Strategy documentation

Version 2.03 (November 11th 2015)
Added Windoku Full version history here

Window numbers refered to in strategy results are:

 9 5 5 5 9 6 6 6 9 7 1 1 1 7 2 2 2 7 7 1 1 1 7 2 2 2 7 7 1 1 1 7 2 2 2 7 9 5 5 5 9 6 6 6 9 8 3 3 3 8 4 4 4 8 8 3 3 3 8 4 4 4 8 8 3 3 3 8 4 4 4 8 9 5 5 5 9 6 6 6 9
Solver created on 11-Nov-2015.