I am looking for a site that publishing riddles and problems such as Project Euler publishes problems in computer science. Is there any similar site that is hardcore in the area of physics?

This site has some good problems set, but it seems like there isn't a community and sharing of solutions/ideas like in Project Euler.

I am looking for a site that publishing riddles and problems such as Project Euler publishes problems in computer science. Is there any similar site that is hardcore in the area of physics?

This site has some good problems set, but it seems like there isn't a community and sharing of solutions/ideas like in Project Euler.

I am looking for a site that publishing riddles and problems such as Poject Euler publishes problems in computer science. Is there any similar site that is hardcore in the area of physics?

this site has some good problems set, but it seems like there isn't a community and sharing of solutions/ideas like in Project Euler.

I am looking for a site that publishing riddles and problems such as Project Euler publishes problems in computer science. Is there any similar site that is hardcore in the area of physics?

This site has some good problems set, but it seems like there isn't a community and sharing of solutions/ideas like in Project Euler.

I am looking for a site that publishing riddles and problems such as https://projecteuler.net/ publishes problems in computer science. Is there any similar site that is hardcore in the area of physics?

this site has some good problems set, but it seems like there isn't a community and sharing of solutions/ideas like in Project Euler.

I am looking for a site that publishing riddles and problems such as Poject Euler publishes problems in computer science. Is there any similar site that is hardcore in the area of physics?

this site has some good problems set, but it seems like there isn't a community and sharing of solutions/ideas like in Project Euler.