What do you think the hardest passport to receive IS?

My guess would be Western Sarah because of limited internet access; North Korea again limited or no internet access but because of false flag players I have NK; 

Oops forgot about Pluto

Niue is a toughie!!

From https://www.chess.com/insights#geography you can see which countries you played most. Of the 241, it seems like there are a few that I've only played once or twice.

On the other side of the equation, the countries you'd expect are the one's I've played most often-- U.S., India, Russia, Canada, Brazil, etc.

yes, there is a vatican city passport which i believe is the most difficult to obtain

niue

North Korea ofc, excepting the trolls

South Georgia

North Korea should theoretically be the hardest one to get, but people started trolling and it became more common.

i had it myself back in 2021