An assortment of ~ 5 chess boards with pieces are on tables on Level 2 in the St. Louis Mercantile Library, around the base of the pyramid and in the atrium beneath the pyramid. A board may also be available on Level 1.
Boards may be moved around in the same general area, but do not remove them from Levels 1 & 2.
Put the boards back where you found them when finished.
Set the pieces up for the next game.
Finish any games at least 15 minutes before closing (consider it a draw!).