I’m still very new to UPBGE and trying to make a game menu currently. Imagine 9 buttons in a 3 by 3 grid. I need it to where you can only choose one button per column and per row. For example:

1 2 3

4 5 6

7 8 9

If you chose 1, then you wouldn’t be able to choose 2, 3, 4, or 7. This would leave you with 5, 6, 8, and 9. If you then chose 8 the last option available would be 6.

I’m fairly certain this is possible, I just don’t know where to start. Any help is much appreciated.