.CK1

.CK1 file extension

This is the basic program to work with .CK1 extension

ChessBase Light 2007

ChessBase Light 2007 ChessBase Theme classification

The program works with the following extensions: ctg, cbm, cto, cbp, pgi, cbt, pgn, cbv, cbz, cib, cit, ck1, cbs, ck2, cko, ck3, cba, ckn, cbb, cp1, cp2, cbc, cp3, cbe, cpn, cbf, cpo, ctb, cbh and cbgi

.CK1 extension is also supported by the following programs:

ChessBase 9

ChessBase 9 ChessBase Theme classification

ChessBase

ChessBase ChessBase Theme classification

ChessBase 13 is a personal, stand-alone chess database.
ChessBase Reader

ChessBase Reader ChessBase Theme classification

Read chess games written in various formats and display them on a chess board.