"Two experts from each of the rival auction houses arrived at Maspro's Tokyo offices, where they were shown to a conference room with a very long table and asked to sit facing one another, Mr. Rendell said. Each side's experts had an accountant from Maspro sitting with them.
Instead of the usual method of playing the game with the hands, the teams were given a form explaining the rules. They were then asked to write one word in Japanese - rock, paper or scissors - on the paper.
After each house had entered its decision, a Maspro manager looked at the choices. Christie's was the winner: scissors beat paper"
New York Times link.