Falling Sudoku

Drop down tiles and place according to the Sudoku rules. A number may only appear once in every row, column or 3x3 area.

1. 1

   Each box, row and column must contain each number once - no repeats.

2. 2

   Look at the empty cells and cross out numbers that already appear in that row, column or box.

3. 3

   The number left over is the only one that can go there.

4. 4

   Type the number in, or tap the cell and choose it.

5. 5

   Stop when every empty cell is filled - then check for mistakes.