This piece dives into a classic physics puzzle—calculating the equivalent resistance of an infinite grid of resistors. It’s one of those brain-bending problems that seems simple at first glance but quickly spirals into a rabbit hole of math and theory. The discussion (linked via Hacker News comments) unpacks different approaches, from symmetry tricks to more advanced techniques, and highlights why this problem captivates engineers and physicists alike.

Editor’s Note: At first glance, an infinite resistor grid might sound like academic navel-gazing, but it’s actually a gateway to deeper concepts in network theory, electronics, and even materials science. Understanding how resistance behaves in idealized systems helps engineers model real-world circuits and materials—plus, it’s just plain fun for puzzle lovers. If you’ve ever geeked out over a tricky math problem, this one’s for you.