Sudoku

How to play

1. The grid has 9 rows, 9 columns and 9 boxes of 3 × 3.
2. Place a digit from 1 to 9 in every empty cell.
3. Each digit appears exactly once in every row, column and box.
4. Every Oriqela grid has a single solution you can reach by logic alone, without guessing.

Tips

• Start with digits that already appear often: they have few places left.
• Turn on notes to keep track of a cell’s candidates.
• A cell with only one candidate left can be filled straight away.