Deep Gray

Deep Gray is a giant computer that is capable of playing NetChess. Deep Gray was defeated by Tora in a NetChess competition.
Deep Gray controls a NetNavi that appears to be a recolored copy of KingMan.EXE.

"Deep Gray" is a not-so-subtle reference to the actual chess playing computer "Deep Blue" which was the first computer to beat a reigning world champion.

(Source: The Mega Man Knowledge Base)