Comment on Not Sure How to Tell When Masking Technique Has Been Removed in Kryptos K4 by Mark

I went further with the idea, there are 8 categories of letters in Morse. Bobby Fischer invented a chess timing idea in the 90’s (clock?) could these be chess moves in his famous confrontation with Boris?
RKBQKBKR
as in Rook to Queen 4 or whatever?