The link at the bottom of the zkSNARKs explainer part III leading to part IV is broken. it seems to have a ¨.html¨ at the end without which it works.
I’ll give ECC a heads up.
If z.cash is supposed to remain a more general educational resource, then it might be good not to have the links to explainer series from here What are zk-SNARKs? | Zcash
e.g. Explaining SNARKs Part I: Homomorphic Hidings - Electric Coin Company
redirect to electriccoin.co/