If you have a few chess sets at home, try the following exercise: Arrange eight queens on a board so that none of them are attacking each other. If you succeed once, can you find a second arrangement?

A chess problem that has stumped mathematicians for more than 150 years has finally been cracked. The n-queens problem began as a much simpler puzzle, and was first posed in an 1848 issue of the ...

The original version of this story appeared in Quanta Magazine. When Covid-19 sent people home in early 2020, the computer scientist Tom Zahavy rediscovered chess. He had played as a kid and had ...

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