.CK3

.CK3 file extension

This is the basic program to work with .CK3 extension

ChessBase Light 2007

ChessBase Light 2007 ChessBase Theme classification

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

.CK3 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.