The "9#11" chord is a complex and colorful chord quality often encountered in styles like jazz and fusion. This chord includes a root note, major third, perfect fifth, major seventh, and two important extensions: the ninth and the augmented eleventh (#11). Unlike more basic chords, a 9#11 has a rich, sonorous quality that's both melodic and dissonant. The sharp eleven creates an exotic tension that is particularly effective in creating a sense of movement or unresolved expectation in compositions, making it a popular choice amongst jazz musicians. Understanding where this chord resolves best is crucial for effectively incorporating it into your music.