Main riff:

    A               e dim           b                    E        
|---------------|------------0--|-----------------2--|------------2^4--|
|------------2--|---------2-----|------------3-------|---------5-------|
|---------2-----|------3--------|---------4----------|------4----------|
|------2--------|---------------|------4-------------|---2-------------|
|---0-----------|---1-----------|---2----------------|-----------------|
|---------------|---------------|--------------------|-----------------|

it's use all over this song in exception of the solo and the chorus which are played with chords