Weird Speaker Placement Configurations

My latest listening room has presented me with many challenges, because it is not only a listening room, but also a "music room", study and spare living room.

So fitting everything, including a piano, a big desk and two sofas, working around a glass pocket door and fireplace, while accomodating Magneplanar Tympanis has been no small feat.

In the end, my solution has me sitting with my back in the corner of the room behind the desk most of the time.

This has me wondering: could it be possible to successfully fire speakers diagonally across a room?

Obviously there has been lots of discussion of short vs long walls, distance from walls etc. but is it possible to create the classic triangle where the speakers vary in their distances from their respective boundaries in the room?

Or would this create obvious problems?

Of course I can also experiment, but experimentation can be a full day's work with Tympanis.

Has anyone stumbled into success with an unusual or unexpected placement of their speakers?

Thank you,