The chords are just G,D,C,D,G,C,D,G
Just listen to the strum pattern and play along for the intro.
[ Tab from: https://www.guitartabs.cc/tabs/t/the_tossers/madrin_rua_tab.html ]
(u) (u) (u) (u) (u) (u) (u)
e-3--3-3--2--2-2--0--0-0--2--2-2--3--3-3--0--0-0--2--2-2--3--|
B-3--3-3--3--3-3--1--1-1--3--3-3--3--3-3--1--1-1--3--3-3--3--|
G-0--0-0--2--2-2--0--0-0--2--2-2--0--0-0--0--0-0--2--2-2--0--|
D-0--0-0--0--0-0--2--2-2--0--0-0--0--0-0--2--2-2--0--0-0--0--|
A-2--2-2--x--x-x--3--3-3--x--x-x--2--2-2--3--3-3--x--x-x--2--|
E-3--3-3--x--x-x--x--x-x--x--x-x--3--3-3--x--x-x--x--x-x--3--|
(u)= Upstroke
I'm not sure on the rest of the song, but once the singing starts, I think it's just a
standard up down strum motion for the same chords played for full length of the bar. (I
think that's a good way to describe it?)
