Shane's Chess Information Database (Scid) is a free and open source UNIX, Windows, Linux, and Mac application for viewing and maintaining large databases of chess games.

Scid has undergone several stages of development, firstly by Shane Hudson, then by Pascal Georges.

Database features include a Move Tree with statistics, Player Information and Photos, and General Searches for specific endings (e.g. pawn vs. rook or rook vs. queen), positions or players.

[5] Scid's speed is due to its storing chess games in its own compact database format (si4), but it also supports the popular portable game notation (PGN).

[8] Its major new feature is a Computer Tournament mode and also includes rewritten Gamelist, FICS and Analysis widgets.