All games
Divide the number board into islands that match the target sums.
Similar games
Fill the grid with bells and whistles, matching the group numbers on the rows and columns.
Color each hex cell black or yellow to satisfy the target sums along the edges.
Fill cages with numbers using addition, multiplication, subtraction, and division to hit each target.
Make the sum of each row and column match the numbers on the perimeter.
Fill the board with dominoes so that the dots add up in each row and column.
