Players take on the guise of one of the leaders and try to kill off the other two in a Death Matchtype shoot-out modelled on the Unreal Tournament game system.
Murray said his match against Youzhny, 25, who is seeded third and is ranked 19th in the world, would be "a different match against a different type of player".
Prof Stolper compared the signatures with a catalogue containing thousands of Earth rocks, and determined the nearest match to be an igneous type, the formation of which he likened to the production of colonial apple jack liquor.