http://www.sciencebase.com/science-blog/classic-chords-1-the-hemispheres-chord.html
One thing I noticed as a teen teaching myself to pick out the wondrous chords played by Rush's Alex Lifeson by ear was that he used a lot of chords where the top two strings, the B and the E string were left to ring while a moveable chord shape, often a B major shape or more commonly an F major shape (but, not barre) was relocated up and down the neck.
Here's that classic chord, often known as the Hemispheres chord, although it features on Xanadu, The Fountain of Lamneth, The Spirit of Radio and many others songs in various positions, and makes a lovely reappearance in Far Cry!
