Hard Slitherlink by Ken Endo - The Video
Added 2020-03-17 17:57:39 +0000 UTCAs mentioned in tonight's video on YouTube, if you are interested in harder Slitherlinks then do try this wonderful puzzle from Ken Endo:
And if you get stuck then here is a bonus video for all our patrons in which Simon solves it (less quickly than the <4min time recorded by Kota Morinishi)!