🎮 Play Mephisto Gideon Professional Online (DOS)

Mephisto Gideon Professional is a championship-winning chess program released for MS-DOS in 1993. Developed by Ed Schröder and published by Lokasoft, the Gideon engine is a piece of computer chess history, known for delivering a formidable challenge to players of its era. This is a serious, highly capable chess simulator that tests your strategic skills against an engine originally written entirely in C.

How to Play

The objective is standard chess: outmaneuver the computer and checkmate the opponent’s king. The game is controlled using your keyboard, just as it was on original DOS hardware. Use the keyboard to navigate the interface or enter moves. For a full-screen experience, press Right Alt + Enter.