Thanks to Qaos for this week's Prize challenge.
Solving time significantly shorter than median. Many clues were rather easy, even redolent of a Quiptic, but there were sufficient tricks to provide Prize-worthy entertainment, and Vlad's 29,491 impalement earlier in the week reduced my appetite for difficulty. Several anagrams with disguised fodder stood out.
FOI 1, LOI 11.
COD 2, narrowly pipping 11. Also enjoyed 13, 12, 27, 18 and 19d.
Qaos is a mathematician, which should endear him to some on the forum (including myself). Favo(u)rs "ghost themes", and I noticed two candidates here.
See
https://www.theguardian.com/crosswords/crossword-blog/2012/nov/29/crossword-blog-setter-qaos