Yep, I do intend to sepparate game logic from game view. What I need to be reusable is this manager, as you call it, which should be able to manage "tiles" belonging together (let's call this aggregation of tiles a "pawn") - it is just about the graphical representation, the piece (the qobject you are proposing) itself will take care of the logic and of updating this "pawn" within the manager (or rather, tell the manager update it - thus I think the best place for functions to graphically manipulate "pawns" in all kind of ways is in the manager).

Hmm? You cannot put more of what on the scene? grid layouts? Why not? You can place as many of them as you want.
How?