DIFFICULTY · GENIUS
Genius Sudoku
Genius Sudoku is the top classic challenge band. Sparse progress, exact candidate work and several linked techniques may be required, but every included puzzle is validated before release.
Who Genius is for
Choose Genius after fish, wings, coloring and candidate chains are dependable parts of your solving process.
Solve without guessing
Recheck singles and locked candidates before extending a chain. For every advanced elimination, verify each strong link and every affected peer.
Use Genius Coach
The five-level deterministic Coach can name the technique, identify the unit and relevant cells, explain the elimination, and reveal the proven move only when needed.
A fair extreme challenge
Difficulty is tied to solving evidence rather than clue count alone, and the active puzzle saves locally between sessions.