As it says on that page that hunter linked to:
"Even the most expert players usually don’t have all chords in all keys memorized. The right side of the Complete Guitar Chord Poster shows the fingering positions of extended jazz chords such as 11ths and 13ths, organized so that you can find any chord fingering position in any key at a glance."

We all need reference material, regardless of our skill level because there is so much to learn we all tend to specialise in things.. and then use reference material to branch out.