Lenat and Eurisko gained notoriety by submitting the winning fleet (a large number of stationary, lightly-armored ships with many small weapons)[3] to the United States Traveller TCS national championship in 1981, forcing extensive changes to the game's rules. However, Eurisko won again in 1982 when the program discovered that the rules permitted the program to destroy its own ships, permitting it to continue to use much the same strategy.[3] Tournament officials announced that if Eurisko won another championship the competition would be abolished; Lenat retired Eurisko from the game.[4] The Traveller TCS wins brought Lenat to the attention of DARPA,[5] which has funded much of his subsequent work.