A Line Allows Progress A Circle Does Not

E|--------------------------------------------------------------------
B|-------3---------3--------3-------3---------------------------------
G|-----3--3------3--3-----3--3----3--3--------2----------2------------
D|---0---------0----------------------------| 4--4-------4--4---------
A|----------------------4--------4---------2----------2---------------
E|--------------------------------------------------------------2~| --
E|-------------|  
B|-------------|  
G|-------------|  
D|--------------| 
A|-------------|  
E|0--2----------| 

| /  slide up
| \  slide down
| h  hammer-on
| p  pull-off
| ~  vibrato
| +  harmonic
| x  Mute note