Checkmate Headquarters Official Name Unknown First appearance Unknown Contents[show] History History of location is unknown. Notes No special notes. Trivia No trivia. See Also Appearances of Checkmate Headquarters Location Gallery: Checkmate Headquarters Links and References None. Retrieved from "https://heykidscomics.fandom.com/wiki/Checkmate_Headquarters?oldid=1629162" Categories: Locations Templated Articles Image Needed Location History Needed Community content is available under CC-BY-SA unless otherwise noted.