In World of Warcraft, which raid instance features a chess event?

In the world of Warcraft, the raid instance that features a chess event is Karazhan. This iconic raid is located in Deadwind Pass and retells the story of Medivh, the last Guardian of Tirisfal, and his haunted tower. The chess event takes place within the grand ballroom of Karazhan, where players take control of various chess pieces and engage in a strategy-based battle against opposing pieces to defeat the Chess Event boss, which ultimately opens up further progression within the instance.