The chess puzzle in Destiny 2 is just the first piece in an all-consuming puzzle the Destiny community is rapidly trying to solve ahead of the The Edge of Fate expansion reveal for Destiny 2 on May 6.
As soon as you start, head straight for the elevator and ride it up. Go down the stairs in the next room, then drop down into the sewers below. Follow the waterway forward, take a right at the end, ...