I completed the diabolical level in 19:27. I could have completed it much faster but I was doing it in the background while talking and commuting.
I'll be looking for a daily sudoku feed that requires more difficult techniques! Any suggestions?spoiler
I found this one quite simple, especially using Snyder notation. I didn't find I had to use even intermediate strategies this way or fill in anything more than what fits in with Snyder techniques.