Who plays chess int the westing game and how was it revealed?

In "The Westing Game" by Ellen Raskin, the character who plays Chess is Dr. Julian Eastman. His involvement with chess is revealed through a conversation between other characters, particularly when they discuss the connection between the game and the unfolding mystery surrounding the Westing estate. The strategic nature of chess parallels the complexities of the plot, highlighting themes of strategy and foresight among the characters.