Sudoku Helper
Candidate Display
Select Candidates to display.
Hide All Candidates
Show 1s
Show 2s
Show 3s
Show 4s
Show 5s
Show 6s
Show 7s
Show 8s
Show 9s
Show As
Show Bs
Show Cs
Show Ds
Show Es
Show Fs
Show Gs
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.
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
Copyright © 2007 - 2016 John Ironmonger
This page last updated on October 10, 2015