With your cursor inside the minesweeper window type "XYZZY" then press Shift-Enter and Enter. A white dot should appear in the upper-left corner of the screen. If it turns black, your cursor is resting on a mine.
Mine's was started by Tsuzo Niikura in 1985. It attracted attention in 1988 by being among the first Japanese companies to sell re-programmed ECU systems for popular Japanese sports cars.
This acknowledgment of his strength made Jogo so proud that he shed tears for the first time, completely unaware he was even capable of crying. In his final moments, Jogo visualized Dagon and Hanami.