Border Sum Sudoku - puzzlephil

## Border Sum Sudoku

### Rules

Fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9. The numbers at the border indicate the sums of the three first digit in that row or column.

### Variants — Special Bordersum Sudokus

These Bordersum Sudokus have irregular and/or additional coloured regions.

#### Colour

##### Colour
Titel

Timer

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