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A term used for a person in chess who checkmates the other guys king with a rook on the back rank of the board. Usually when a king is castled with 3 pawns in front of it, the rook slides down to that rank and the king is stuck behind the pawns and cannot escape leading to checkmate.
Chess player one: How did that guy win?
Chess player two: He was a backranker.
Chess player one: :(
by TheRaginRussian June 11, 2014
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