Triple Doku

How to play Triple Doku

• Goal: Fill all three 9×9 grids so every row, column, and 3×3 box contains digits 1-9 exactly once.
• Layout: Three grids sit side-by-side in a 9×21 playfield. The amber 3×3 stacks are shared — a digit there counts for both adjacent grids.
• Grid A (teal border) ← shared AB → Grid B (cyan border) ← shared BC → Grid C (green border).
• Tap a cell then tap a digit (1-9) on the palette, or use the keyboard.
• Notes mode: toggle pencil marks to track candidates per cell.
• Cream = given clue, cyan = your entry, red = conflicting.
• Complete all three grids to win. Three mistakes = game over.