A little focus. A clearer mind.

Use cage sums and Sudoku logic together. No repeated digit inside a cage.

One daily puzzle, leaderboard pressure, streaks, and ZOKU rewards.

Battle another player on the same puzzle and climb seasonal rankings.

Diagonal Sudoku adds two long diagonal houses to the classic grid.

Irregular regions replace the normal 3x3 boxes for a different scan pattern.

Extra 3x3 regions create more intersections and earlier eliminations.

Thermometer paths force digits to rise from bulb to tip.

Neighbor marks reveal adjacent cells that must be consecutive digits.

Five overlapping grids create a larger long-form Sudoku challenge.