https://imo-grand-challenge.github.io/ https://imo-grand-challenge.github.io/ This is a similar contest where the plan is exactly as you describe - to develop

https://imo-grand-challenge.github.io/ https://imo-grand-challenge.github.io/ This is a similar contest where the plan is exactly as you describe - to develop a way to solve formal descriptions in Lean of IMO problem.