G13

G1B3D5F♭7A9E13

Seven notes in theory and four or five in anyone’s hands: root, third, seventh and thirteenth carry it.

What is true of it

G13 is G, B, D, F, A and E — 1, 3, 5, b7, 9 and 13 counted from G.

On an instrument that cannot reach all 6, the 5, 9 and 1 go first, in that order.