Sudoku technique hub

Sudoku Techniques

Plain-English guides for every SudoSketch solving method, from singles and pairs to wings, fish, colouring, chains and ALS logic.

How to use these guides

Start with the easier techniques first. Sudoku solving is usually a ladder: singles, locked candidates, pairs, triples, fish, wings, colouring and then chains.

Each page gives the idea in plain English, explains when to look for the technique, and points out the common mistake to avoid.

All technique guides