To play a powerful guitar chord one can choose to include as many notes as possible… or double the ones that are played. An example of the former would be (in tablature):
C: 3-3-2-0-1-0 (an unorthodox thumb may be used for the low G
An example of the later:
C: x-3-5-0-5-0 (x means muted)
Notice the “same” G and E is played twice!
(It’s never the same, you know. There’s a nice article about a letter from Richard Feynman partly about this fact. So Feynman knew string theory ha ha.)
I knew about these possibilities when playing, e.g. this E7:
E7: 0-7-6-7-5-0 (a Hendrix E chord would end thus: 8-0, rings nicely in Pixies’ Brick is Red)
But I noticed how nice Death Cab for Cutie’s Crooked Teeth verse sequence sounds.
The sequence: Em-A7-C-G
A7: 5-7-5-6-5-5 (this one’s the usual)
C: x-3-5-0-5-0 (as above)
This also has to do with my switching back to electric guitar… but being unable to plug it most of the time! (What with the kids running around).