Solver App for Android
Sudoku Solver
for Android
Updated 28 Jan 2026
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6x6 Killer Solver
By Andrew Stuart
Candidates can be Edited Highlighted Chained Coloured   Shown
Automatically clear off candidates as numbers are entered.
Overwrites manual editing.Auto Clear		 Clues+Solved: 0/81
Pick an example here

The Rules

You should also be aware of the Killer Cage Convention.

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 sum of th digits in all the cells in the block.

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.

Help on Killer Definitions used in this solver for transporting puzzles. This solver uses the KenKen packed string with prefix 'L6C'.
1 2 3 4 5 6
A
B
C
D
E
F
           
           
           
           
           
           
1
2
3
4
5
6
Version 2.62.5
Coordinate system: Letter/Number rYcX

Show Candidates
Check for Solved Squares   
Show Possibles  
 1: Hidden Singles  
 2: Pairs Naked+Hidden  
 3: Activated when a single cell is inside or outside a block.Innies and Outies (1 cell)  
 4: Two-cell cages and cages which have only one combination
Hover over the clues in the small grid to see combinationsKiller Combinations (easy)		  
 5: Pointing Pairs  
 6: Box/Line Reduction  
 7: Triples Naked+Hidden 
 8: Cages with necessary combination numbers can have them removed from the unit they align on.Captured Candidates  
Tough Strategies
 9: X-Wing  
10: Chute Remote Pairs  
11: Y-Wing  
12: W-Wing  
13: Rectangle Elimination  
14: Cage Splitting  
15: Innies/Outies (2+ cells)  
16: Combinations are reduced if some numbers uniquely overlap a unitCage/Unit Overlap  
17: Cages which have several combinations
Hover over the clues in the small grid to see combinationsKiller Combo's (hard)		  
18: Cage combinations which can only lead to even or odd cage totals can be used to make deductionsRule of Parity  
19: Cage Compare  
20: Simple Colouring  
21: Quads Naked+Hidden  
22: Swordfish  
23: XYZ Wing  
Diabolical Strategies
24: X-Cycles  
25: XY-Chain  
26: 3D Medusa  
27: Jellyfish  
28: WXYZ Wing  
29: Aligned Pair Exclusion  
Extreme Strategies
30: Grouped X-Cycles  
31: Finned X-Wing  
32: Finned Swordfish  
33: Altern. Inference Chains 
34: Almost Locked Sets  
35: Death Blossom  
36: Forcing Nets  
"Last Resort" 
37: Bowman's Bingo 


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

Welcome to this 6x6 Killer Solver

New: Version 2.61 (May 24th 2026)
Harmonised this solver with the 9x9 Killer to ensure 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 2.31.1 (13th Mar 2025)
6x6 Killer Solver released
Separated from the 6x6 KenDoku solver.
The packed string prefix is 'L6C'.






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.

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.