In the beginning, they were clearly distinguished, however, in the Edo period, both 雙六 (board Sugoroku) and 双六 (picture Sugoroku) were just called as 双六 (Sugoroku), then the name became vague.
両者は古くは峻別されていたが、江戸時代には雙六（盤双六）と双六（絵双六）が双方共に双六と称されていたため、混乱が生じた。