Sudoku

How to play

• Fill the grid so every row, column and box has each number exactly once.
• Tap a cell, then a number. Tap the number again (or ⌫) to take it out. On a computer, type numbers and use the arrow keys.
• A number that clashes with another in its row, column or box is marked. Hint fills in a cell that follows from the rest.

Every puzzle has exactly one answer, and logic alone gets you there. No guessing needed. Easy is a 4×4 grid, Medium 6×6 and Hard the classic 9×9. Everyone gets the same puzzle each day. Each level has one puzzle a day, and new ones arrive at midnight.

Solved!