@Adám can you publish the fastest one? I don't think the fastest one was the winner's one right? (from my brief tests) and it would be interesting to know
@Adám Maybe you could ask the author if Dyalog could do a blog post/talk on it similarly to the phase 1 highlights? There's not enough out there on writing performant APL for real(ish) problems (imo) and this could be a very useful example.