You play against chess program-opponent wrote to me during game

Hi lichess community,hi moderators
I would like to ask You-
Is it allowed to play with help of openings Explorer during rated games?

In one of my games opponent wrote to me-
"You play against chess program",
I asked him-what program?
He answered me that he use Openings Explorer,
I don't know is it legal?
Thank You for Your answer
Christopher

Duplicate of question 3:
lichess.org/qa/258/all-about-cheating-questions-and-answers

i think is legal on correspondence otherwise lichess wouldn't allow the openings explorer on the analysis board . but on non correspondance games is not allowed . not sure if i answered you question . Dzień dobry :)