Discovered attack
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Discovered check by the bishop
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Discovered attack by the bishop
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Discovered check by the rook
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Discovered attack by the rook
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Discovered check by the queen
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Discovered attack by the queen
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The idea
A discovered attack uncovers a line piece (bishop, rook or queen) by moving the piece in front of it, creating two simultaneous threats. A discovered check is the strongest: the opponent must answer the check while the moving piece captures freely. Look for your line pieces screened by a single friendly piece.