YA Fantasy. Girl is held captive/ prisoner. While being held she is taught a strategy game (similar to chess). Read 2012-2017.

[Mandy]

The girl gets free. I can't remember if she's let or or rescued. Once she's free she leads a group of people to a place where everyone who previously tried to get there died from boobytraps. The main character is able to lead tbem saftely through

[Kris]

Mandy, around what year did you read this book? A range of years is fine.

[Mandy]

Hi Chris, I read it between 2012-2017.

[Kris]

Why is the girl held captive and by whom? Why is she taught a strategy game (similar to chess)? (Spoilers are okay in the comments - just give us a clear warning before revealing a spoiler.)

[Nóinín]

The protagonist in The Traitor Game is a boy, not a girl, but the plot sounds very similar. Maybe we can do a "books similar to" search.