To solve a Doble, you need to fill all the white squares with the numbers 1 to 9. Like so →
The dots ( ) by the side of grid represent the numbers for the corresponding row or column
To the right is a key to show what combination of dots represent which number.
when you see the dots together like this ( ) they can represent several different
combinations of numbers such as (1,3,2) or (7,2) or (3,6).
So try and decipher the clues and fill in the grid.