All the King’s Horses Robert Plant Robert Plant And The Strange Sensation - All The King's Horses from the album "Mighty Rearranger" written by Robert Plant Right, this is the toughest song to date that I've tabbed by ear. Tough because even I could tell it was in an open tuning, I wasn't sure what that tuning was. I started open C when I heard the droning C chord at the very end of the intro. So I started a bit with Powertabs, my personal favorite song-learning and -writing program, (guitartabs.cc)