PRICES MAY VARY. The book offers 100 puzzles with discovered attack and discovered check. Real chess games are used to create those puzzles. Please keep in mind that these are do-it-yourself exercises, therefore you must be familiar with all of the basic chess principles. Use “look inside” for additional details. When a player moves a piece out of the way to expose a previously blocked attack by another piece, this would be known as a discovered attack. - In a discovered check, one piece moves, allowing a bishop, rook, or queen to open a line towards the opposing king.