I don't know what chord you are looking for, but don't see anyone mentioning a dim chord.. I have always used it..

Oh here is a page that shows it..

http://www.theguitarguy.com/sinceife.htm


Here is my version with diminished chords

https://app.box.com/s/90egr3ud154jseop3sukz4mg0o1xqg5x