ChessCreator, I am asking you to stop.  You are the one doing the edit warring.  WP:ENGVAR says that subjects with strong national ties should use the appropriate variety of English.  American bio, American English.  If we were talking about the Sicilian Defence it wouldn't matter much, but the Ware Defense is named for Preston Ware Jr, an American.  You moved St. George Defense to St. George Defence and changed the spelling in that article saying it was "insulting".  Do you apply your own standards to yourself?  The St. George move was good for the same reason that this article should use American spellings.  Your unilateral decision to change the established spelling in the stable articles Open Game, Closed Game, etc. betrays your agenda.