Game Flags are indicators of some characteristic, such as Brilliant Play or White Opening, and are used for classifying games and enabling fast database searches. There are 12 user flags and 6 custom flags
Additionally, Delete is just a special-case flag, which indicates games will be removed when the database it is next compacted.
The 12 user flags are
The 6 custom flags (1 to 6) are user changeable, and can have labels up to eight characters long.
Flags are set in the Maintenance Window. Scid vs. PC also allows quick flag tagging via the Game List context menu.
You can use a Header Search to find all games in a database that have a particular flag turned on or off, or use flags as part of more complex searches.
Since all the user flags (except Delete) have no special significance, one may use them for any purpose. For example, you could use the Kingside (K) flag for kingside pawn storms, or kingside heavy piece attacks, or even for endgames with all pawns on the kingside.
Note, sensible handling of flags can speed up searches significantly!
The following functions of Scid set or require flags: