Sudoku Helper
Candidate Display
Select Candidates to display.
Hide All Candidates
Show 1s
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Show As
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Show All Candidates
To enter a new puzzle click a cell and select a number for that cell. Enter all the given numbers then click the "Start" button to begin solving. To work on a sample puzzle select it from the list below.
To work on a puzzle click on a cell then use the yellow box to add or remove candidates and the blue box to enter a value. The colored buttons can be used to color cells to assist solving. Use the "Undo" button to remove your previous changes. If you want help to solve the puzzle click the "Next" button and the helper will show you a next step.

Use the "Test" button to make sure the puzzle has a unique solution.
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1
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 Load the numbers entered on the puzzle above and setup the puzzle for solving.Undo the last change to this puzzle.Clear this puzzle and start over.Test to determine if this puzzle has one and only one solution.Analyze this puzzle and show difficulty rating and strategies used to solve it.Create a new puzzle.
If some solving strategies are disabled the new puzzle will require only the enabled strategies and Cross Hatching to solve and will present at least one instance of the most difficult enabled solving strategy even though it may not be required to solve the puzzle. If only one strategy is enabled that strategy will be needed somewhere in the path to solve the new puzzle. 

To enter a new puzzle click on the cells to insert the given numbers then click "Start" to begin solving.

To have a puzzle created for you click "Create".

To work on a sample puzzle select one from the list.

Solving Strategies
Select Strategies to use.
Disable All Strategies
Cross Hatching
Counting
Naked Set
Hidden Set
Claiming
Remote Pairs
X Wing
XY Wing
Simple Coloring
Fishy Things
Unique Rectangle
X Chain
XYZ Wing
WXYZ Wing
XY Chain
X Chain with Groups
Aligned Pair Exclusion
Sue-de-Coq
Forcing Chains
Multi Coloring
XY Chain with Groups
3D Medusa Coloring
Finned Fishy Things
Almost Locked Sets
Nice Loop
Nice Loop with Groups
Pattern Overlay Method
Enable All Strategies
Puzzle Size
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This page last updated on December 22, 2024