Portal:Chess/Did you know/27

...that, of the twenty-three iterations of the United States Women's Chess Championship contested between 1938 and 1971, in only six did neither Woman International Master (WIM) Gisela Kahn Gresser nor WIM Mona May Karff finish in at least equal first, and that each woman, Gresser in 1969 and Karff in 1974, won her final title aged at least sixty years?
...that Hydra, a chess-playing computer principally programmed by German Christian Donninger, has, notably having scored five-and-one-half points over six games against English Grandmaster Michael Adams, then the world's seventh-ranked player, and having scored three points over four games against former Fédération Internationale des Échecs world champion Grandmasters Russian Alexander Khalifman (1999), pictured, Ukrainian Ruslan Ponomariov (2002) and Uzbek Rustam Kasimdzhanov (2004), never lost over-the-board to an unaided human player but did lose a two-game correspondence chess match to German Grandmaster Arno Nickel and in its current form achieved only a draw against Nickel?
...that the term "Check Mate" comes from the ancient Persian saying-"Shah Mat" meaning Your king is dead?
...that it is possible to finish a chess game in just 2 turns?