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.

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nxtfari a day ago | parent [-]

Ha, okay I caved and spent the 5¢ to ask Carbon the problem through openrouter and it was indeed able to solve it. No random hallucinated fact either. Thought you might want to know. Cool problem!

	▲	Kotlopou a day ago \| parent [-]
		Interesting indeed, thanks! Are you able to share the conversation? This problem was made to stump Gemini last December. I actually made another one back then, designed to be more brutal, and I'm curious whether Carbon figures that one out, if you have a few more cents to spare: https://substack-post-media.s3.amazonaws.com/public/images/e... A friend solved it in an hour with just a few vague hints (there's no need to Google anything; two subproblems require a bit of knowledge that a caveman would not have but you surely do; it's all one problem and it is neither necessary nor recommended to solve 12 subproblems). Back when we made this, we wondered with this friend whether it would still be possible to stump Gemini the next year. (Already Gemini 3 could solve a few straightforward Bongard problems, including at least one of the subproblems here.) Bongard problems are cool because you can create infinite variations of them on pretty much any concept, and they seem to capture some kind of flexibility in thinking (when they are well-designed -- there are definitely arbitrary-feeling ones), so this would be a pretty big milestone for me.