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The Logic of Sudoku
 
Killer Sudoku Solver Please report any bugs. Tested in IE and Firefox.
 Feedback: Form and User Comments/Questions Here
 
Click to edit candidates or enter a solution:

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Pick an example here

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 Killer puzzle using the new 'designer' - click on "Enter new Killer". 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.
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Version 1.64
See Strategy Overview documentation

Coordinate system: Letter/Number rYcX

If you are getting errors please clear your browser
cache to retrieve the latest script files
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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: Naked Quads 
6: Killer Combinations (easy)  
7: Innies and Outies  
8: Cage Splitting  
9: Pointing Pairs  
10: Box/Line Reduction  
Tough Strategies
11: Killer Combinations (hard)  
12: X-Wing  
13: Simple Colouring  
14: Y-Wing  
15: Sword-Fish  
Diabolical Strategies
16: X-Cycles  
17: XY-Chain  
18: 3D Medusa  
19: Jelly-Fish  
20: XYZ Wing / WXYZ Wing  
21: Aligned Pair Exclusion  
Extreme Strategies
22: Grouped X-Cycles  
23: Finned X-Wing  
24: Finned Sword-Fish  
25: Altern. Inference Chains 
26: Sue-de-Coq  
27: Cell Forcing Chains  
28: Unit Forcing Chains  
29: Almost Locked Sets  
30: Death Blossom  
31: Pattern Overlay Method  
32: Quad Forcing Chains  
"Trial and Error"
33: Nishio 
34: Bowman Bingo 


Please report any bugs - Thanks.



Welcome to this new Killer Solver

I have been solving and making Killer Sudoku puzzles since 2005 and although my Sudoku solver has been part of this site since those early days I have not attempted a public solver until now. The main reason I have shied away from attempting it was the complexity of the puzzle in terms of the user interface. However, I hope I have now come up with a satisfactory solution. The independent 'Designer' handles the entering of the clues and cages. Keeping this separate and being able to (loosely) validate the entry should allow puzzle solvers a fairly quick way of setting up the puzzle for solving. I hope agree and I'd love to hear your feedback.




New in version 1.64 (March 10th 2010)
Fixed a series of bugs with editing candidates in the large board.

New in version 1.63 (March 3rd 2010)
3D Medusa and much improved forcing chains. A new system of symbolising chains.

New: Version 1.02 (June 13th 2009)
Killer Sudoku Solver released

Still to do:

  1. Some kind of emailing and importing using only a single string. Unfortunately the information required to transport a Killer using a web address is a little too large. The puzzle requires the clues, the cages and the state of the board during play. So I haven't thought of an easy method to provide those features.
  2. I will be adding a Solution Count soon.
  3. Much of the Killer strategy text that is displayed in the result panel is a little too obscure. I will be making more friendly versions in the next upgrade.



Solver created on 30-May-2009.

This page was last modified on 05-March-2010.
All code and design is copyright and for personal use only and may not be reproduced elsewhere.
Copyright Andrew Stuart @ Scanraid Ltd, 2005-2009