Here we deal with Part 1 of the song, as played by Izzy. We recommend learning Slash's part first, as it has a little more going on in it. However, Izzy's is a bit easier, so you may find this the best one to begin with. Both guitarists play many of the same riffs together, but there are some differences. The song is in Eb, so drop each string by 1 note to:
Low Eb : Ab : Gb : Db : Bb : Eb
The song is long, so we're dividing it into 3 parts. However, it's length is largely due to the fact that many of the riffs are repeated time and again. You could learn this 1st part of the song, and know most of all the main song parts.
Intro - Nice and simple build up leading into the main riff. You can hear Slash's guitar play chords over the top.
Main Riff - This is the signature riff of the song, and the one that most people want to learn first. It's played exactly the same by Slash, except the last tail. Izzy descends through powerchords, whereas Slash ascends up through higher powerchords.
Verse 1 - A simple chord progression using double stabs. Izzy plays lower chords than Slash to beef up the sound. He also doesn't play the palm muted downstrokes between stabs. There are small sections of standard chords which act as mini-bridges during the verses.
Verse 2 and Verse 3 - These follow the same structure and format as Verse 1, just using lower chords.
Bridge - This powerchord section links to the following main riff again.
Heartbeat - This next part is where the 'heartbeat' plays in the song. It's short and simple on the guitar. Afterwards the song reverts back to the previous riffs until the following bridge....
Bridge - We end Part 1 with this section of the song. Izzy plays different chords to Slash here, and then slows down as the song melts into the gentle interlude (which is the next part of the song).