Our system made its debut at HSNCT in 2015.
We then played against Ken Jennings at the University of Washington later that year.
We then took on another team of top quiz bowlers at HSNCT 2016.
We then returned to HSNCT to face off again against a team of top quiz bowlers.
In June of 2018, in collaboration with OUSIA, we created a competition so that people could craft questions specifically designed to stump computers. Writers crafted questions that stumped our system, QANTA, and then played against OUSIA, a different, stronger system. Read the preprint for more information.
At the end of the year, we hosted a competition at the University of Maryland with a bracket full of human and computer teams. The human teams prevailed over their mechanical counterparts in the first round, and Team "Rage Against the Machine" claimed first place after subsequent rounds. Full results can be found here: Human-Computer Question Answering Competition Results, and you can watch a video series below.
While not as high-powered as the other systems here, UMD undergrad students took on Jeopardy! All-Stars May 2019.