I recently wrote an article for Downbeat magazine’s September 2018 “Woodshed” column on substitutions for diminished chords. I got a little overly excited at all the possibilities, so unfortunately Downbeat had to edit the article down a bit. Below is a link to download the unabridged version for free.
Thanks to Downbeat editor Ed Enright for graciously giving me permission to print the full article on my web site.