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Elliptical Pool: An Even Nerdier Sport Than Quidditch

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It's so mathy!

While working on his book The Grapes of Math, Bellos became fascinated by the ellipse. “The shape has these wonderful geometrical properties that we’ve known about since the ancient Greeks,” he says. Instructors frequently illustrate these properties by describing how balls would rebound on an elliptical pool table. Bellos decided to bring that thought experiment to life, refining a set of rules for a two-player game that takes full advantage of the shape.

Loop requires a cue ball, three colored balls, and an elliptical table with one uncharitably small pocket. The billionaire quantitative investor David Harding—a noted benefactor of worthy scientific causes—underwrote the five-figure cost of a single luxuriously appointed Loop table. “If any American billiard companies want to produce more, I’d love to work with them,” Bellos says.

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