Asymmetric PoW algorithms, such as Cuckoo Cycle [1] or the poorly named Equihash [2] (which is not a hash function) do not lend themselves to password hashing,

Asymmetric PoW algorithms, such as Cuckoo Cycle [1] or the poorly named Equihash [2] (which is not a hash function) do not lend themselves to password hashing, since a given problem instance can have 0 or 1 or many solutions. [1] https://github.com/tromp/cuckoo https://github.com/tromp/cuckoo [2] https://en.wikipedia.org/wiki/Equihash https://en.wikipedia.org/wiki/Equihash