To the Trained Eye, Discards Can Reveal a Hand’s Secrets.

The defense use signals (when following the suit led) and discards (when discarding a suit other than that led) to provide their partners with information about their hand. This information can suggest what their partner should lead, or provide information about the shape of their hand.

Revolving Discard: This discarding method provides a suit preference signal on the first discard in a hand. There are two variations: 1) a low card requests the suit below the discarded suit and a high card requests the suit above; 2) a low card requests the lower of the other two suits; a high card requests the higher.