Groupsum Sudoku - puzzlephil

## Groupsum Sudoku

### Rules

Fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9. The numbers in the small circles indicate the sums of the four sourrounding cells.

### Variants — Special Groupsum Sudokus

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

#### Colour

##### Colour
Titel

Timer

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