Math Grid Challenge

- How to play: the player checks the empty squares, a green check means that the box is checked, a red x or blank corresponds to the unchecked box.
- The player's task is very simple:
Check the cells so that the sum of the cells marked in rows must equal the number on the right and the sum of the cells marked in columns must equal the number at the bottom. When the sum of the rows and columns is equal to their respective values, you will win.