There are of course already a near infinite number of guitar fretboard studies available, and scads of 5,000 Guitar Chords and Scale books. What’s unique about this spreadsheet I put together is that it’s a one page reference. It helps if you first memorize the fretboard notes, but from there the “number system,” probably a simplification of the “Nashville system,” provides an efficient map for chord and scale fingering possibilities. I also wanted to learn how to attach a .pdf file to the blog. Click link below and check it out.