Addendum to Note: There is precedent for the changing or renaming of pieces in chess. For instance, why do bishops move diagonally? Because they are not clergymen... they are ships, which must tack against the wind. In the Middle Ages, when the Church realized that it was not represented anywhere on the board, the game was altered so that the pieces closest to the royalty were the clergy. They moved in the same way, but were now to be called "bishops" instead of "ships."
This leads one to wonder just who was pulling the strings to get Cthulhu onto the board.
Addendum to Addendum to Note: No, I'm not telling you how the Cthulhu piece moves. The minute I do that one of you clever yoinkers out there is going to tell me why I'm WRONG, it CAN'T move like THAT unless you blah blah blah blah castle to queen four and shut up already.