New clue released EAST -> FLRV and again: 4th time my calculations are correct:
EAST clue for (IS_NOT_KR vs IS_KR) = (6 vs 1,5) – pattern again (6/1,5 = 4)
taking into consideration all clues we get:
average_distance(letters in IS_NOT_KR) = 8,07
average_distance(letters in IS_KR) = 2,1
based on 11 + 9 + 4 = 24 letters
KRYPTOS (or something created from these letters) seem to be the key for K4.