Solver App for Android
Sudoku Solver for Android
Check out the App features.
SudokuWiki.org
Strategies for Popular Number Puzzles
Solvers
Weekly 'Unsolvable'
Puzzles to Play
Apps
Str8ts
Other
Window numbers Referred 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
Windoku Solver
Please report any bugs and feedback welcome
Solve Path now excludes unchecked strategies
Candidates can be Edited or Highlighted / Shown
Enter clues or solutions
1 2 3 4 5 6 7 8 9
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: Rectangle Elimination  
11: Swordfish  
12: XYZ Wing  
Diabolical Strategies
13: X-Cycles  
14: XY-Chain  
15: 3D Medusa  
16: Jellyfish  
17: WXYZ Wing  
Extreme Strategies
18: Grouped X-Cycles  
19: Finned X-Wing  
20: Finned Swordfish  
21: Altern. Inference Chains 
22: Sue-de-Coq  
23: Digit Forcing Chains  
24: Nishio Forcing Chains 
25: Cell Forcing Chains  
26: Unit Forcing Chains  
27: Almost Locked Sets  
28: Death Blossom  
29: Pattern Overlay Method  
31: Quad Forcing Chains  
"Trial and Error"
31: Bowman's Bingo 

Key
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
clear your browser cache
to retrieve the latest script files.
Auto Tab Auto Clear
Clues+Solved: 0/81


Note: All Chaining strategies now permit cycling alternatives, where found read more
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 2.12
See Strategy Overview documentation

Coordinate system: Letter/Number rYcX


1
2
3
4
5
6
7
8
9

Welcome to my Windoku page

Free Sudoku and Str8ts for Print

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.



New in version 2.10 (October 8th 2023)
Added chain cycling. If more than one chain is found the solver will provide buttons to cycle through them. Longstanding feature now implemented. More information on What's New

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













Solver created on 11-Nov-2015.
This page was last modified on 11-Jun-2023
All code and design is copyright and for personal use only and may not be reproduced elsewhere.
Copyright Andrew Stuart @ Syndicated Puzzles, 2005-2023, Privacy