Twodoku

How to play Twodoku

• Goal: Fill both 9×9 grids so every row, column, and 3×3 box contains digits 1-9 exactly once.
• Layout: Two grids sit side-by-side. The middle 3×3 stack (highlighted amber) is shared — a digit there counts for both grids.
• Tap a cell then tap a digit (1-9) on the palette, or use keyboard.
• Notes mode: toggle pencil marks to track candidates per cell.
• Yellow = given clue, green = your entry, red = conflicting.
• Complete both grids to win. Three mistakes = game over.