'From Squeak3.6alpha of ''17 March 2003'' [latest update: #5325] on 6 July 2003 at 9:35:42 pm'! "Change Set: removeChessConstants-asm Date: 6 July 2003 Author: Alejandro Magistrello Removes ChessConstants from the system"! "Postscript:" Smalltalk at: #ChessPlayer ifAbsent: [Smalltalk at: #ChessConstants ifPresent: [ :cc | cc removeFromSystem. SystemOrganization removeCategoriesMatching: 'Morphic-Games-Chess' ] ] !