Microsoft magnate Bill Gates lost a chess game to the newly-crowned world champion Magnus Carlsen in just 79 seconds.
Challenged to a game during a chat show on Norway's NRK TV, Gates said although it had "a predetermined outcome" he would take part.
Gates, who Forbes magazine ranked as the world's second-richest person behind Mexico's Carlos Slim, had two minutes to make his moves against Carlsen's 30 seconds.
The 23-year-old Norwegian, dubbed "Justin Bieber of chess", took just nine moves to checkmate his opponent.
"Wow, that was fast," Gates said with a smile after loss.
Asked by the host Fredrik Skavlan under what circumstances he felt intellectually inadequate, Gates answered: "When I play chess with him".
Carlsen, who became a grandmaster at the age of 13, received non-stop television coverage in Norway when he beat defending champion Viswanathan Anand of India last November to take his first world title.