Complex sentence: He later moved to 91 Lenox Road where the club gradually changed from a chess league to a casual meeting place for chess celebrities to meet and such as Irving Chernev, Hermann Helms, and Irving Riskie.
Split into simpler sentences: He later moved to 91 Lenox Road where the club gradually changed from a chess league to a casual meeting place for chess celebrities to meet. Guests and visitors included Irving Chernev, Hermann Helms, and Irving Riskie.