Iv'e been thinking of one possible way of making it one sided, I think it's legal and doable but am not sure...
If some full court shooter could shoot a curved shot that will be directed towards the outside of the field and curve back inside and into the 2 point goal or even the 3 point goal it could be unblockable...
The reason I think it's legal is that the rule says that "ROBOTS may not intentionally eject DISCS from gameplay" and I do not think it's considered ejecting the discs, because they only leave the field for a split second and will stay ingame in case of a miss.
It should be unblockable because "ROBOTS may not contact
anything outside of the FIELD", and the only "safe" point of contact (that is far enough from the shooting robot, but still reaches the disc's flying height) is out of the field.
Finally, it should be doable because iv'e seen more than one curved full court shooter, and there is a slight gap between the ends of the field and the net that is big enough to fit a disc. I even think that a minor contact with the net will not deflect the frisbees too much given the flight and spin direction...
