If chess is a solved problem, think about skating to where the puck is going to be, an interest area a bit further away from relatively easier verifiability such as coding, math, and hard sciences.
Do you have any interest in digital humanities? Knowledge work where verification is still important but not as black-and-white as does the math check out, does the code run.
Do you have any interest in family history or genealogy?
Where is the strongest community of Gramps developers?
I love Gramp's extendibility and would like to get involved. I'd love to talk to some of the folks involved, to learn more about their plans. I see the community at the official site, but I'm wonder if there's more activity elsewhere.