Comment by sega_sai
3 months ago
There is a somewhat similar idea behind "Ponder This" by IBM https://research.ibm.com/haifa/ponderthis/index.shtml They post a problem every month and in the end post a solution. I used to spend a bit too much time on those.
The difference is that Ponder This is harder than the average problems in Euler Project, and requires higher level of mathematical maturity.