Appeals Committee. Disputed situations in tournaments.

RiMpel2 just showed me something amazing. He can now find the Grail by looking at just one obelisk without a marker, and now I can do it too.

Well, how do you determine the location of the Grail based on just one piece of the map?! Is this some kind of cheat? Or does it only work when there is actually only one spot of a certain landscape, and the Grail is buried there? But that's just luck!