Sudoku: the classic number puzzle

Sudoku as you know it: fill the 9×9 grid with the numbers 1 to 9, with three levels and a stopwatch to beat your own time.

• Tap an empty cell and pick a number from the pad below.
• Every row, every column and every 3×3 box must hold the numbers 1 to 9 with no repeats.
• Turn on notes to pencil in candidates; finish before the countdown runs out for double cookies.

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