Blues Before Sunrise 
This very old Blues classic (covered by many artists like John Lee Hooker) was 
composed by the Blues duo Leroy Carr (1905 - 1935) and Scrapper Blackwell (1903 
- 1958/62?). Carr was a self-tought piano player, Blackwell a guitar player. 
Between 1928 and 1934 they recorded more than 100 songs, some of them became 
real evergreens (like How Long Blues). Carr died at the age of 30 - liver 
cirrhosis, too much drinks, Blackwell was shoot in 1962. 
EC played this song in open C# tuning (!) using a slide. Open C# tuning? Yes. 
You can get this by starting with open E tuning and then tuning the guitar down 
three semitones (E - D# - D - C#). Or you start with standard tuning and proceed 
as follows: 
  start tuning the high E string to the B string pressed down at the 2nd fret (= 
  C#) 
  continue like (* is the string to be tuned) 
I--0*-------------------C#--I
I--2--0*----------------G#--I
I-----1--0*-------------F---I
I--------3--0*------0---C#--I
I-----------4--0*-------G#--I
I--------------4----0*--C#--I

then start fine tuning 
  play all C#'s together (1st, 3rd, 6th string) 
  play both G#'s together (2nd, 5th string) 
  and finally... 
I--0--------------I
I--5--0-----------I
I-----3--0--------I
I--------4--0-----I
I-----------5--0--I
I--------------7--I

Start your first open slide lick to test your tuning: 
I----------12~~-------------I
I---10/12-------------------I
I--------------10/12--------I
I--------------------12~~---I
I---------------------------I
I---------------------------I

OK, here we go - the intro, volume turned LOUD... 
I--/12-12-12-12-12-12-12\--repeat--/12-12-12-12-12-12-12--repeat-3x--/15-12-10/12~~--I
I--/12-12-12-12-12-12-12\----------/12-12-12-12-12-12-12-------------/15-12----------I
I--/12-12-12-12-12-12-12\----------/12-12-12-12-12-12-12-----------------------------I
I------------------------------------------------------------------------------------I
I------------------------------------------------------------------------------------I
I------------------------------------------------------------------------------------I
0:00

I-/15-12-10/12--12-10------------------------12\10-----------------------------------I
I-/15-12--------------/12\10-----------------------/12\10----------------------------I
I---------------------------/12--------------------------/12-------------------------I
I-------------------------------12---------------------------12\---------------------I
I-----------------------------------0-2-0-0-----------------------0-2-0-0------------I
I-----------------------------------0-0-0-0-----------------------0-0-0-0------------I
                                              00:16

I----------12-12-12-/12-12-/12-10-------------12-/12-/12\10--------------------------I
I---10/12-------------------------12-12--/12----------------/12\10-------------------I
I---10/12----------------------------------------------------------/12---------------I
I---10/12---------------------------------------------------------------12-----------I
I-----------------------------------------------------------------------12-----------I
I------------------------------------------------------------------------------------I

And the main turnaround, in the well know way walking down one string while 
keeping another one constant at the root note C#: 
I---------------------I
I---------------------I
I---------------------I
I--0-0-0-0------------I
I--3-2-1-0------0-0---I
I-----------5/--------I
  00:24

Than the vocals start (I have a blue...) and we can play the rhythm like we use 
to play in a 12 bar Blues (C# - F# - G#7), but without slide. To find the chord 
positions in open tuning a little help (open strings: C#/I, 5th fret: F#/IV, 7th 
fret: G#/V): 
I---------------------------------------------------------------------I
I---------------------------------------------------------------------I
I---------------------------------------------------------------------I
I---------------------------------------------------------------------I
I-0-0-2-2-0-0-2-2--------5-5-7-7-5-5-7-7------------7-7-9-9-7-7-9-9---I
I-0-0-0-0-0-0-0-0--------5-5-5-5-5-5-5-5------------7-7-7-7-7-7-7-7---I
  C#                     F#                         G#

The short solo is played like the intro, with a few exra notes.