Complex sentence: Southard was a member of two local chess clubs and he was described in his New York Times death notice as "one of the foremost amateur chess players in America" and he often arrived at his laboratory in the morning after spending all night awake playing chess.
Split into simpler sentences: Southard was a member of two local chess clubs and he was described in his New York Times death notice as "one of the foremost amateur chess players in America". He often arrived at his laboratory after spending all night awake playing chess.