Hey all. I've had the idea for this video for a while and like usual, it ended up getting much longer than I wanted it to! But I think there's some good info in it that hopefully may give you some ideas for your own chord and get a better idea how Allan writes.
If you're interested in buying some of my Allan Holdsworth lesson material:
https://holdsworthpdfs.e-junkie.com/
0:00 - Intro
3:57 - Choral style
8:42 - 7th family chords
11:03 - Triads with extensions
12:57 - Triads with avoid notes
16:47 - Chords with b9 interval
18:51 - Close voiced chords
20:36 - Wide voiced chords
21:50 - Unique interval stack
23:56 - Traid plus extra note
27:05 - Two-Chord phrase
35:11 - Same interval stack
38:47 - Maj and min triads
43:58 - Same chord shape
48:45 - Pedal point
50:26 - Lanyard Loop composition example