What Solving Techniques does SadMan Sudoku Use?
SadMan Software Sudoku uses the following solving techniques (text in brackets indicates alternative names):
- Naked single (singleton, sole candidate)
- Hidden single (unique candidate)
- Block / column / row interactions (pointing pair)
- Block / block interactions
- Naked pair, triplet and quad (naked subset, disjoint subset)
- Hidden pair, triplet and quad (hidden subset, unique subset)
- X-Wing
- Swordfish
- XY-Wing
- XYZ-Wing
- XY-Chain
- Colouring
- Forcing chains
- Trial and error (Ariadne's thread, backtracking, guessing)
See also in what order does SadMan Sudoku use the various solving techniques?
- Overview
- Screen Shot
- FAQ
- Upgrade
- Change History
- Translations
- User Comments
- Buy
- Printable Grids
- Solving Techniques
- Glossary
- Links
- Support Forum
| What People Say |
|---|
 Love your program! I work Easy on Saturday, Sunday, and Monday; Moderate on Tuesday, Wednesday, and Thursday, and Hard on Friday. And when I'm having difficulty with other Sudoku puzzles, it's great to be able to input it into Sadman to see what's what.  Judd Smalley, New Jersey |
| More … |
