A guitar fretboard allows you to play all keys the same, but not by default (unless you limit yourself to the bottom four strings), because of the irregular maj

A guitar fretboard allows you to play all keys the same, but not by default (unless you limit yourself to the bottom four strings), because of the irregular major third between the G and B strings. If you want only one fingering you'll need to use a regular tuning: https://en.wikipedia.org/wiki/Regular_tuning https://en.wikipedia.org/wiki/Regular_tuning