I know of https://code.world/ https://code.world/ and https://www.codewars.com/?language=haskell https://www.codewars.com/?language=haskell and https://liquid.k

I know of https://code.world/ https://code.world/ and https://www.codewars.com/?language=haskell https://www.codewars.com/?language=haskell and https://liquid.kosmikus.org/01-intro.html https://liquid.kosmikus.org/01-intro.html but I've never actually tried them. (I don't have the stamina for exercises. I read LYAH and some of RWH and then started on some actual projects, which quickly showed me what knowledge I was missing and then I looked up stuff at RWH/blog posts/haddocks/freenode#haskell.) You may get more relevant answers at https://www.reddit.com/r/haskell/ https://www.reddit.com/r/haskell/