Wirespan, a daily power grid optimization puzzle I made for my son
This was a lot of fun to build! I have an autistic son who is extremely interested in power lines, electrical transmission towers, and how the grid works. I decided to build a little game for him. When I finally showed it to him with bated breath, he rolled his eyes and said, “Is it 3D? I’ll only like it if it’s 3D!” So, I decided to polish it up and release it to the world! You get a 9x9 map with one power plant, three houses, and terrain obstacles, and the goal is to connect the power plant to the houses with an optimal path. Beneath the coat of paint, it’s a graph theory optimization…
In plain words
Wirespan is a daily puzzle game where players route power from a plant to houses on a 9x9 grid using the least wire possible. The game combines graph theory optimization with the challenge of balancing square-based reach distances against circular wire measurements to find efficient paths around terrain obstacles. A new puzzle resets worldwide each day at midnight, and players can track their solutions in a personal archive.
written from the facts on this page · September 2026
From the sources
Route power from the plant to every house using the least wire possible. One shared grid worldwide, new at midnight.
This grid is not perfect yet, so studying it marks the day 📖 studied in your archive and in its share. A studied perfect is still a perfect. It just says so. One message to the person who built this. It goes nowhere else. Route power from the plant to every house using the least wirefrom wirespan.app
In the maker’s words, at launch
This was a lot of fun to build! I have an autistic son who is extremely interested in power lines, electrical transmission towers, and how the grid works. I decided to build a little game for him. When I finally showed it to him with bated breath, he rolled his eyes and said, “Is it 3D? I’ll only like it if it’s 3D!” So, I decided to polish it up and release it to the world! You get a 9x9 map with one power plant, three houses, and terrain obstacles, and the goal is to connect the power plant to the houses with an optimal path. Beneath the coat of paint, it’s a graph theory optimization puzzle, very nearly a Steiner-tree puzzle. Any two nodes within Chebyshev distance 2 are wired together automatically. But the wires travel in Euclidian space, so reach is measured on a square and wire on a circle. The skill is balancing that asymmetry to find the shortest route to light up the whole map. Because the original goal of this project was to provide joy to my son, I’ve done my best to make it accessible to everyone. It’s localized into 18 languages so far, has a high-contrast mode meeting AAA standards, reduced motion mode, etc. I do collect usage telemetry to help me improve the game, but I’ve done my very best to take privacy very seriously, collecting anonymous stats about the gameplay itself, with a random id the game generates rather than anything about the player or device. I also generate the privacy policy directly from the analytics code, as a contract to ensure nothing is ever collected without being fully disclosed. I had a really great time with this project, and hope to continue to improve it! I’d love any feedback I can get! Please let me know if you have any questions, and I’ll stick around to answer them! (Reposting because my first attempt landed during a super quiet hour and didn't really get seen)
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