a check that is effected by moving an intervening piece from the line of attack of a queen, rook, or bishop.
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Origin of discovered check
First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for discovered check
chess check given by moving a man that has been masking a potential check from a bishop, rook, or queen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012