B13 chord

The B dominant thirteenth chord (abbreviated "B13 chord") is a seven-note chord consisting of the notes B, D♯, F♯, A, C♯, E, and G♯. The chord is formed by adding a thirteenth to a B dominant eleventh chord.

In practice, the fifth (F♯) and eleventh (E) are often omitted from the B13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.