Thats like asking "what parts of an art piece should/can be judged to decide whether its beautiful".
IMO, your best bet would be to put it to a community. You could have a vote by chess.com members, and you could always limit it to players of a certain rating minimum, or whatever.
Hello all,
I'm not very active in online chess right now, but I have a question in which I think the chess.com members could be very helpfull.
I am the owner off a jewelry-store and I sponsor a chesscompetition. As part off the sponsoring I also offer a price for the most beautifull game played.
Offcourse this will be subject to opinion.
Now here comes the question;
Which parts off a chessgame should/can be judged to decide the most beautifull game?