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ChessBase 13
that player.
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Several special editing functions, e.g. for setting a common source or tournament for
the selected games.
3.4.23 File names and extensions
All files which belong to an individual database have the same name, but their suffixes
are different:
NAME.CBH
NAME.CBG
NAME.CBA
NAME.CBP
NAME.CBT
NAME.CBC
NAME.CBS
= Game data (“H” is for game “header”).
= Game moves and variations (“game”).
= Annotations (text commentary).
= Players index.
= Tournament index.
= Commentators index.
= Source index.
These files contain the minimal game information in a database. If you delete the CBA
file all commentary will be removed from the games – but not the moves and the
variations, which are stored in the CBG file. If you delete the CBG file the database
can still be opened and many operations carried out (e.g. openings, players,
tournament indexes, statistics). You can even load individual games, but of course
there are no moves to play through. It is not recommended to delete files of a
database, if necessary, please be sure to have a backup before doing so.
NAME.CBE
NAME.CBJ
NAME.CBM
= Team index.
= Second header file, team information, final material.
= Multimedia baggage in HTML database text files.
Those files contain additional information to the games. If they are lost, information is
irrevocably lost, but the games will still be fine.
NAME.CBB
= Search booster.
NAME.CBGI = A second smaller search booster.
NAME.CIT
= Index file for fast player/tournament/team access, automatically
generated, if lost.
NAME.CIP
= Index file for fast player/tournament/team access, automatically
generated, if lost.
The first two contain hashed information on the games in a database. It increases the
speed of retrieval by a factor of 100. These files are generated by the program and
they are not critical.
NAME.CKO
= ChessBase key, openings.
NAME.CPO
= ChessBase positions, openings.
These files contain the openings keys for a database. The CKO file contains the names
of the keys and the record numbers of the games for each key. The CPO file contains
the positions which ChessBase uses to classify a game and determine which openings
variation it contains.
NAME.CKN + .CPN
= General theme key, theme definitions.
NAME.CK1 + .CP1
= Tactical theme key and definitions.
NAME.CK2 + .CP2
= Strategic theme key and definitions.
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