If you have an Ultra subscription (I don't or I would try it) I would be really curious if Carbon is able to solve your harder Bongard problem without making stuff up given it's absurdly high AA Omniscience non-hallucination score, it's supposed to be like 30%+ better than nearest non-Google competitor. Although Hydrogen xhigh apparently scored within 5% of Carbon so who knows ¯\_(ツ)_/¯
I don't have that subscription, but for the record, it's this problem: https://imgur.com/a/idyH0Kh
I won't share the solution (you have to keep some mystery in the world), but I showed this a year ago at a high-school reunion and five people independently found the same solution, so it should be well-posed.