The contest takes the form of the Turing Test where human judges have to work out whether they are chatting to humans or software by typing responses into a computer.
Computer scientist Alan Turing, the designer of the contest, argued that if the judges couldn’t distinguish between humans and software, the software could be thought of as simulating human intelligence. No software has yet passed the full Turing Test (although some has passed limited versions).
The Loebner Prize is awarded to the software that the judges think creates the best simulation, regardless of the fact that it may not pass for human.
Jabberwacky is different from previous winners in that it works out its conversational rules by interacting with humans.
It has a website where visitors can chat to the software, but crucially, they can correct the software when it gives odd or meaningless responses, so the software can adapt to the correct rules of conversation.