After a failed attempt of Eidansha Boshu Service to go nationwide in 1982, its newly established Enix subsidiary began a foray into the gaming market by holding a personal computer game programming contest. One of the winners was "Love Match Tennis", created by Yuji Horii. It would go to become one of the company's first PC releases. Another winner was the puzzle game "Door Door" by Koichi Nakamura, which would become one of the company's better known home computer titles. The game was subsequently ported to the Nintendo Family Computer, but never saw any form of release outside Japan. Nakamura would stay on board as one Enix's key programmers.