yeah this could be a good idea
Suggestion: Multiplayer Window

I think it would be great to be able to play multiple games of the same opening. That way you could try different variations at the same time. It would be really great. I don't know if this is possible from a programming position, but it would be cool.

Yeah I knew you could play multiple different windows...but you can't (as far as I know) resize the windows. This would all be in one window.
I had this idea while playing today in live chess. It would be cool to play multiple games at once without sacrificing desktop space.
Using the same screen size as the original board you could separate the board into fourths looking something like this:
Thus playing 4 games similtaniously