- math olympiad
- unsolved problems in computer science
- the x-games
edit:

maker of tiny games | navigator of retail chaos | artist | FFXIV fan (Ryusui Teira@Brynhildr) | he/him | trans rights are human rights | death to crypto
edit:
#2 if there's rng manipulation (cryptography problem), #1 if it's pure probabilities
SMW is likely an unsolved problem in computer science, as is celeste
source: https://arxiv.org/abs/1203.1895
fun fact: the YUMP 2 level "Proof that SMW is NP-Complete" is a reference to the above paper
Which category does 'pretty much reprogramming the game via arbitrary code execution and/or abusing a stack underflow glitch' fall into? Because some Pokemon speedruns are that.