What difficulties does Quantum Universe include?

Choose Very Easy, Easy, Medium, Hard, or Hardest. Each level uses its own clue and difficulty profile.

Do I need an account for Quantum Universe?

No. The game works without an account and saves the current puzzle locally on this device.

Ultimate

Samurai hybrid Sudoku

Solve five overlapping 9×9 grids whose shared regions must agree.

Puzzle setup

Select a difficulty to prepare your Quantum Universe adventure.

How this world works

Extreme overlapping-grid logic. Solve five overlapping 9×9 grids whose shared regions must agree.