Engine
A chess-playing computer program used for analysis, training, or (illicitly, if undisclosed) in-game assistance.
Modern engines such as Stockfish and the neural-network-based Leela Chess Zero vastly exceed human playing strength and are now central to both elite opening preparation and anti-cheating enforcement.
Etymology
There is a nice irony here: engine meant intelligence long before it meant machinery. The English word dates from c. 1300 as “mechanical device,” from Old French engin, from Latin ingenium “innate qualities, ability; inborn character” — so a “chess engine” is etymologically a chess ingenuity. The modern computing sense is surprisingly recent: in 1986, Linda and Tony Scherzer entered their program Bebe into the 4th World Computer Chess Championship, running it on “Chess Engine,” their brand name for the chess computer hardware made by their company Sys-10, Inc. The sense then migrated to software: by 1990 the developers of Deep Blue were writing of a “searching engine,” and in December 1991 a German magazine referred to Chessbase's Fritz as a “Schach-motor.” By early 1993 the modern engine/GUI distinction was explicit.
First documented: 1986 — “Chess Engine,” the Sys-10, Inc. brand name for chess computer hardware used by Linda and Tony Scherzer's Bebe at the 4th World Computer Chess Championship, 1986
Translations
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