This article explores the concept of the most heartbreaking chord in music. It suggests that the chord, known as the "Tristan chord," originated in Richard Wagner's opera Tristan und Isolde, and is known for evoking deep emotions. The author discusses how this chord's unresolved tension mirrors the feelings of pain and longing associated with heartbreak. Additionally, the article makes a point that although music can elicit different emotional responses from each listener, the Tristan chord has a remarkable ability to universally touch the hearts of people.