What metaphors are used in Endgame by Samuel Beckett?

Early in the play, Hamm delivers his first soliloquy, and we are introduced to the master-servant relationship between Hamm and Clov. Hamm addresses his bloodstained handkerchief as "Old Stancher" and is convinced that his suffering is greater than all others and establishes the dual metaphor throughout the play: the rhetoric of chess strategy and drama as game and competition.