Using an Opening book when plating against stockfish?

Can an opening book be used to learn openings when playing against stockfish on Lichess?

Yes

lichess.org/page/fair-play

@corvusmellori said in #2:
> Yes
>
> lichess.org/page/fair-play

Thank you.

That page could really use updated to clarify what "Lichess AI" means, it would be easy for someone to think it was legal against a bot account running stockfish for instance, instead of just the built in stockfish.

@ProgrammerAngrim said in #4:
> That page could really use updated to clarify what "Lichess AI" means, it would be easy for someone to think it was legal against a bot account running stockfish for instance, instead of just the built in stockfish.

I'd agree "Lichess AI" on its own could be misunderstood in this way, but at least just a few rows down separate rules for a "Lichess Bot account" are specified.