BUR #35689 has been rejected.
create alias pawn_white_cookie -> chess_choco_cookie
create alias pawn_black_cookie -> chess_choco_cookie
mass update pawn_white_cookie_(winter_guard) pawn_black_cookie_(winter_guard) -> chess_choco_cookie_(winter_guards) -pawn_white_cookie_(winter_guard) -pawn_black_cookie_(winter_guard)
These two are treated as a single character and there's only one image that doesn't include both, so IMO tagging them separately feels like clutter. We especially don't need to be duplicating an already established costume tag, either.