Yeah, my first thought was that a king cobra should be higher than chimpanzee. Not because king cobras would necessarily be easy, but because it would be possible.

Beating a chimp would depend on whether a human hit to its head could knock it out or at least stun it, as well as getting such a blow in immediately at the start. But my guess is that their skulls are built differently enough that such a hit would just motivate it more.