https://removepaywalls.com/www.newscientist.com/article/2580374-ais-solution-to-87-year-old-riddle-takes-mathematicians-by-surprise/
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https://removepaywalls.com/www.newscientist.com/article/2580374-ais-solution-to-87-year-old-riddle-takes-mathematicians-by-surprise/
Whenever there is a paywall, insert "removepaywalls.com/" before the link