This is the best Coldplay song ever, brilliant!
Trust me, ths is correct!
The strumming just goes up and down. Its a simple beat.

F: -1-   C: -0-  Dm: -5-   Bb: -6-
   -1-      -1-      -6-       -6-
   -2-      -0-      -7-       -7-
   -3-      -2-      -7-       -8-
   -3-      -3-      -5-       -8-
   -1-      -0-      -5-       -6-

Intro - Dm Bb F C x2

Verse 1
Dm             Bb                     F
   Come up to meet you, tell you I'm sorry
                    C
You don't know how lovely you are
Dm           Bb                   F
  I had to find you, tell you I need you
               C
Tell you I'll set you apart
Dm                Bb                     F
  Tell me your secrets and ask me your questions
            C
Oh lets go back to the start
Dm             Bb                 F
  Running in circles, coming in tails
             C
Heads only science apart

Chorus 1
Bb                        F
  Nobody said it was easy
              C
It's such a shame for us to part
Bb                        F
  Nobody said it was easy
             C
No-one ever said it would be this hard
                          F
Oh take me back to the start


Verse 2 - Same chords as first verse

I was just guessing at numbers and figures
Pulling the puzzles apart
Questions of science, science in progress
They must speak as loud as my heart
Tell me you love me, come back and hold me
I wanna rush to the start
Running in circles, chasing tails
Comin' in back as we are

Chorus 2

Same as first chorus, except last line is
"I'm going back to the start"