Strategies for Popular Number Puzzles
Please report any bugs and feedback welcome
Weekly 'Unsolvable'
Puzzles to Play
6x6 KenDoku® Solver
By Andrew Stuart, In association with
Click to edit candidates or enter a solution:
Pick an example here

1 2 3 4 5 6
Version 2.19
See Strategy Overview documentation
Show Candidates
Check for Solved Squares   
Show Possibles  
1: Singles in Row/Col   
2: Singles in Box  
3: Naked Pairs/Triples  
4: Hidden Pairs/Triples 
5: KenDoku Combinations  
6: Dog Legs  
7: Pointing Pairs  
8: Box/Line Reduction  
Tough Strategies
9: Cage/Unit Overlap  
10: X-Wing  
11: Simple Colouring  
12: Y-Wing  
13: Swordfish  
Diabolical Strategies
14: X-Cycles  
15: XY-Chain  
16: 3D Medusa  
Evil Strategies
17: Grouped X-Cycles  
18: Altern. Inference Chains 
19: Digit Forcing Chains  
20: Cell Forcing Chains  
21: Unit Forcing Chains  
22: Almost Locked Sets  
23: Quad Forcing Chains  

Errors? [CRTL]+[F5] to clear and download the latest script files

The Rules

All the digits 1 to 6 must appear in every row, column and 3 by 2 box. In each coloured block (or 'cage'), the target number in the small board above is calculated from the digits in all the cells in the block, using the operation indicated.

Coordinate system: Letter/Number rYcX

Free Sudoku and Str8ts for Print

Welcome to this KenDoku® Solver

This is a demonstration version exclusively for feedback.

New: Version 2.16b (Apr 14th 2024)
Troubleshooting partially entered puzzles. Added [re-start] button

New: Version 2.09 (Nov 28th 2015)
Upgrade to the Core Engine and all most improvements since 2011.

New: Version 2.01 (March 25th 2011)
Updated with all the new Sudoku and Killers (that apply), removed some depeciated ones and one strategy which was not applicable.

New: Version 1.02 (June 28th 2009)
KenDoku Solver released

Quick help: Using this Solver

You can 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 enter a new KenDoku puzzle using the new 'designer' - click on "Enter new KenDoku". Once you fill in the clues and set up the cages correctly it can be solved.

Unlike the other solvers you can only edit the main board when solving. The small board only displays the clues.

Solver created on 30-May-2009.
This page was last modified on 14-Apr-2024.
All code and design is copyright and for personal use only and may not be reproduced elsewhere.
Copyright Andrew Stuart @ Syndicated Puzzles, 2005-2024
KenKen® is a registered trademark of Nextoy, LLC. Puzzle content ©2009 KenKen Puzzle LLC. All rights reserved