Ed's Bridge School Porch Intro

It's just a riff in A and G. The B-section is G, A, and B. The main riff is a barred-version of open-A and open-G, and the B-section is played by moving the open-G chord up to an A and then a B.

I spent a little time on my guitar with this one this morning, and figured out that I missed an element of the main riff, and botched the chorus completely. The main riff is a barred open-A with accents on C (5th string, 3rd fret) and G (6th string, 3rd fret). The chorus is actually G, A, Bb, A and then G, A, Bb, C.

Main riff:
e---------------------------
B--2--2--------------------
G--2--2--------------------
D--2--2------2--2--2------
A--0--0------3--3--0------
E-----------------------3---

Just barre the D, G, and B strings on the 2nd fret with your index finger, and use your middle or ring finger to fret the A and E strings on the 3rd fret.

Chorus riff:
e---------------------------------------------------------------------------------------
B---------------------------------------------------------------------------------------
G--0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---
D--0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---0---
A--2---2---2---4---4---4---5---5---5---4---4---4---2---2---2---4---4---4---5---5---5---7---7---7--
E--3---3---3---5---5---5---6---6---6---5---5---5---3---3---3---5---5---5---6---6---6---8---8---8--

So the D and G strings just drone. If you want to skip playing them, you can play 2-note power chords on the E and A string, or replace them with power barre chords.