Where x you have to mute string with your hand, but u don't have to pull strings
/ - Up
\ - Down
Remember that - Tab is only HELP for you. Tab CAN'T Play!
Here u change G on Em (through empty strings)
G ---u hold G---- | Em
E-|-----3---x---3-----3---x-0---0---x---0---0--0-0x-------|
B-|-----3---x---0-----0---x-0---0---x---0---0--0-0x-------|
H-|-o---0---x---0-----0---x-0---0---x---0---0--0-0------o-|
G-|-o---0---x---0-----0---x-0---2---x---0---0--0-0x-----o-|
A-|-----2---x-------------x-----2---x---------------------|
E-|-----3---x-------------x-----0---x---------------------|
U can also try playing your own version, chords for intro:
G(blues) G(classic) Em
|--2--| |--2--| |--0--|
|--2--| |--0--| |--0--|
|--0--| |--0--| |--0--|
|--0--| |--0--| |--2--|
|--2--| |--2--| |--2--|
|--3--| |--3--| |--0--|
Other tabs of this song (on this site) have bad intro, But u can find there REST OF THIS SONG.
Have Fun!