50
U.S. Patent No. 4,378,116 - issued to Ernö Rubik in 1983 for a "spatial logical toy"
(files.mastodon.social)
A virtual community
Posts from Mastodon users, featured natively in a community, so you can view them without the need for them to be re-hosted or screenshoted, and reply to the original author and Mastodon respondents if you wish.
Has so far included content from Warsandpeas, Mr. Lovenstein, SMBC, Loading Artist, Low Quality Facts, nixCraft, ElleGray, and other interesting or provocative stuff I've random'd across on Mastodon.
Supported:
Comments & Upvotes
Unsupported:
Posts, Downvotes, & PD's Automod
Oh boy do they ever. Notably a teenager became the first to ever beat one version. . Many news outlets covered it.