Core Chords for Ukulele, The Big Six - From four F7 chord voicings or shapes, your can build your massive 4-part, a.k.a., “jazz” chord vocabulary. Beyond basic open position chords, basic movable form chords and a core set of 4-part chords. There are just too many chords shapes too memorize. Learning the principles of how chords are constructed and the ukulele fingerboard are the way to go. Then you can create more advanced chords like 9#11, 7#5-9, 13b5, 7+9 on the fly as needed.