[russell]

If I were FIRST I would just put a pressure sensor under the triangle, and a sensor (be it optical, pressure, totally insane magic, whatever) to determine when a tetra is removed. If the sensor under the triangle does not detect pressure when the tetra is removed there is a penalty. Otherwise as this guy I know would say "its cool". I realise that this would cause some trouble with their little thing about being within the dimensions, and their other little thing with dangling string onto the triangle, but the point is that it would work, and it would be accurate. And it would comply with the original rules as far as I can tell.