Expert Difficulty
Starting Clues: About 25
For tackling the highest difficulty with advanced techniques.
Expert difficulty offers the bare minimum of clues, so you'll need to bring out advanced techniques like XY-Wing, Swordfish, and Unique Rectangle.
You'll need to read the candidate structure across the whole grid to find a single move. It takes time, but it's designed to be solvable by logic alone.
- Always keep your candidates up to date.
- Make use of chain techniques and fish patterns.