Checkmate is an American government organization dedicated to covert operations. Its precursor is the group the Agency led by Valentina Vostok. Harry Stein founded the organization under direction of Amanda Waller and Task Force X. Their missions are accomplished by special agents, named after chess pieces, around the world. They later became sanctioned by the United Nations. Their leaders include the Black King and Black Queen in charge of operations and the White King and White Queen in charge of intelligence.
Checkmate was created by Paul Kupperberg, Steve Erwin, and John Byrne, first appearing in Action Comics #598. (1988)
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