-
Hi Ursula ( @campfire ) . I think the the chords that Tony used in last week’s challenges represent the 7 notes in the scale in the key of E.
A chord consists the 3 note: the root note (which provides us with the chord name) plus the 3rd note in the scale plus the 5th in the scale. For the A chord these are : A, C# and E.
Because of the way the guitar is designed these notes repeat themselves at numerous places on the fretboard. This allows is to play the A chord at different positions in the neck. Hence the A chord may be played at the second fret and then using a a barre chord at the 5th fret. Fingering these notes on the fretboard requires us to make different chord shapes with your fingers on different strings to produce the chord. The barre chords use the index finger to simulate the nut and then the remaining fingers are placed in the strings and fret positions to play the three notes necessary to make the chord.
Hang in there! I encourage you to return to Fretboard Wizard when you feel you are ready. It helps explain quite a bit.