Solver App for Android
Sudoku Solver
for Android
Updated 28 Jan 2026
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6x6 KenDoku® Solver
Solve Path excludes unchecked strategies ↓

By Andrew Stuart, In association with www.KenKen.com
Candidates can be Edited Highlighted Chained Coloured   Shown


Clues+Solved: 0/81
Help on KenDoku Definitions used in this solver for transporting puzzles

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.

The difference between Killer and KenDoku is that the later uses the other arithmetical operators as well as addition AND KenDoku allows duplicate numbers in the same cage.
1 2 3 4 5 6
A
B
C
D
E
F
           
           
           
           
           
           
1
2
3
4
5
6
Version 2.64.1
Coordinate system: Letter/Number rYcX

See the Strategy Home Page for strategy guides

Show Candidates
Check for Solved Squares   
Show Possibles  
 1: Singles  
 2: Pairs Naked+Hidden  
 3: Cages with necessary combination numbers can have them removed from the unit they align on.Captured Candidates  
 4: Cages where numbers are unique within the cage. Hover over the clues in the small grid to see combinations KenDoku Combinations  
 5: Cages where numbers could contain duplicates within the cage. Hover over the clues in the small grid to see combinations Dog Legs  
 6: Pointing Pairs  
 7: Box/Line Reduction  
 8: Triples Naked+Hidden 
Tough Strategies
 9: Activated when a single cell is inside or outside a block.Innies and Outies (1 cell)  
10: Combinations are reduced if some numbers uniquely overlap a unitCage/Unit Overlap  
11: X-Wing  
12: Simple Colouring  
13: Y-Wing  
14: Swordfish  
15: Cage Compare  
Diabolical Strategies
16: X-Cycles  
17: XY-Chain  
18: 3D Medusa  
Evil Strategies
19: Grouped X-Cycles  
20: Altern. Inference Chains 
21: Almost Locked Sets  
22: Forcing Nets  


Errors? [CRTL]+[F5] to clear and download the latest script files
Solve Order (from Grader)





Welcome to this KenDoku® Solver

New: Version 2.64 (June 11th 2026)
Harmonised this solver to ensure all common features are present.

New: Version 2.34 (Apr 9th 2025)
Added 'Hints Mode' next to Take Step. Choose between only revealing the next strategy, just the pattern or just the eliminations.

New in version 2.28.2 (23th Nov 2024)
New Packed String Definition and transport scheme Now version 'C'. (Version 'B' was live for a week 14th-23rd Nov 2024). Version 'C' allows double the largest clue number.


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.

Email your puzzle to a friend
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Copy and paste the contents of the green box into your email program and send it off.
The links contain the puzzle which will load when your friend visits the Sudoku Solver.