Puerto Rican Cuatro (Standard) Fretboard Explorer

An interactive note map of the Puerto Rican Cuatro (Standard)'s neck: tap a note to light it on every string and fret, and read the lattice for what it is — a B-E-A-D-G neck whose open strings spell G major pentatonic.

Light the open strings first — together they spell G major pentatonic, and that major pentatonic scale is the reason so much of the repertoire sits in the keys it sits in.

Every adjacent pair on B-E-A-D-G climbs, so the open strings run straight from bottom to top across a minor thirteenth.