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.
Sample puzzles
EASY
MEDIUM
HARD
EVIL
All puzzles © by puzzlephil
Variants — Special Groupsum Sudokus
These Groupsum Sudokus have irregular and/or additional coloured regions.
