That's very easy to test. In my profile settings page I changed my country to North Korea, and the flag thumbnail is replaced immediately.
North Korea Player?

I am using North Korean flag because I hate nationalities. Since I couldn't find a way to play the game without a flag, I picked North Korean flag, because I know no North Korean is able to play this game. And it looks funny too in my view.
[Edited by moderator.]

I played a guy with the North Korean flag and I asked him that. He said he worked at an embassy there. True or not, who knows ?

It’s configurable. It detects ip when you first create your account. (Friend was using a vpn set to america and so he had an account defaultly set to america). But you can manually change your flag in settings.
I am using North Korean flag because I hate nationalities. Since I couldn't find a way to play the game without a flag, I picked North Korean flag, because I know no North Korean is able to play this game. And it looks funny too in my view.
[Edited by moderator.]
Kim Jong Un you don't fool us, we know it's you.

Quick question regarding the flag thumbnail that represents a player's location.
Is it based on IP address? or can anyone fake it somehow? because a lot of people said that you can't play against someone from North Korea and yet I played with this guy a little while ago.
You can change your flag in settings
I live in the US.

I am using North Korean flag because I hate nationalities. Since I couldn't find a way to play the game without a flag, I picked North Korean flag, because I know no North Korean is able to play this game. And it looks funny too in my view.
well cant you change your flag to international

Quick question regarding the flag thumbnail that represents a player's location.
Is it based on IP address? or can anyone fake it somehow? because a lot of people said that you can't play against someone from North Korea and yet I played with this guy a little while ago.
You can choose flags. Why North Korea is there, I have no idea.

I am using North Korean flag because I hate nationalities. Since I couldn't find a way to play the game without a flag, I picked North Korean flag, because I know no North Korean is able to play this game. And it looks funny too in my view.
[Edited by moderator.]
Use the international flag.
Quick question regarding the flag thumbnail that represents a player's location.
Is it based on IP address? or can anyone fake it somehow? because a lot of people said that you can't play against someone from North Korea and yet I played with this guy a little while ago.
https://www.chess.com/member/30011650