I have added a link to a tab arrangement that closely follows the original recording. The CS&N recording is in the key of 'E' and uses three guitars. The song is played in a moderately 4/4 uptempo using the unique Bruce Palmer (EEEEBE) alternate tuning. This song was written by Stephen Stills for Judy Collins. Here are the unplugged chord changes that I use to play the Crosby, Stills & Nash 1969 hit Suite: Judy Blue Eyes.