Here another Idea I will throw out there.
You must own a square to be able to move onto it.
You can attack squares via other squares next (all directions diagonal and adjacent) to them and also via pieces that can move onto those squares (ranged attack not bombardment).
Pieces and squares are ...

Accused:

kung_fupanda
katineish




The accused are suspected of:

Being Multis





Game number(s):

4592552
4500801
4501912
4534739
4537205

and many more (though these ones are where the cheating would be most obvious).


Comments:Second player always defers to the first and even ...