 It combines features of the UK edition of "Monopoly", "Scrabble", "Trivial Pursuit", "Operation", "Jenga", chess, and solitaire, among others.A variation on the TV series "Call My Bluff" in which panellists all invent bluff definitions of words.However, unlike the original version, in which participants had to define "obscure" words, in the "ISIHAC" version, players had to define "common" words such as "porcupine".