The AI Challenge was an international artificial intelligence programming contest started by the University of Waterloo Computer Science Club.
Initially the contest was for University of Waterloo students only.
In 2010, the contest gained sponsorship from Google and allowed it to extend to international students and the general public.
Each participant wrote a self-contained computer program to play a game versus an opponent, and then uploaded the source code to a server.
The contest engine used the Trueskill ranking algorithm for matchmaking and to generate the rankings.