Bb m11/G
The Bb m11 chord consists of the Bb (Perfect unison), Db (Minor third), F (Perfect fifth), Ab (Minor seventh), C (Major ninth) and Eb (Perfect eleventh) notes, with G as the bass note.

How to play the Bb m11/G chord
- Play G as the lowest bass note in the left hand
- Find Bb (Root) on the piano keyboard
- Add Db (Minor third) — 3 semitones above Bb
- Add F (Perfect fifth) — 7 semitones above Bb
- Add Ab (Minor seventh) — 10 semitones above Bb
- Add C (Major ninth) — 14 semitones above Bb
- Add Eb (Perfect eleventh) — 17 semitones above Bb
- Press all 7 notes simultaneously to sound the Bb m11/G chord