This episode deals with the concepts of discovered attack, check, and double check. In chess, a discovered attack occurs when a piece is moved and reveals an attack on a piece or square that was previously protected. A check is a direct attack on the opponent's king, and a double check is when two pieces attack the opponent's king simultaneously. In this video, we will look at several different examples of discovered attacks, checks, and double checks, and discuss how these techniques can be used to create threats and gain material. We will also explore how to defend against these types of attacks and how to use them to put pressure on your opponent.