Sudoku

Sudoku technique practice

Practice mode drills one solving technique at a time. Instead of a whole puzzle, the board opens at the exact moment the pattern you chose is the only way forward, with the pencil notes already filled in. Spot it, cross off the candidates it rules out and move to the next one.

Pick what to work on from three groups: wings (XY-Wing, XYZ-Wing, W-Wing), fish (X-Wing, Swordfish, Jellyfish) and chains (colouring, forcing chain, forcing net). Practice never touches the puzzle you have in progress.