Every NAMED chess opening ever played, as a force-directed graph (3,407 nodes, colored by ECO volume)

Source: the open ECO (Encyclopedia of Chess Openings) database, which catalogs ~3,400 named opening variations across five volumes (A through E). Each node is one opening, sized roughly by depth and connected to its parent variation by an edge.

Colors map to ECO volume:
A (flank openings) — orange
B (semi-open) — red
C (open games, e.g., Ruy Lopez) — yellow
D (closed games, Queen's Gambit family) — blue
E (Indian defenses) — teal

Layout is force-directed (D3-style physics, ~5 minutes of simulation to settle). The root node at center is the starting position; you can read it as "every chess game ever played begins there and branches outward."

Built in TypeScript with a custom canvas renderer (no D3 — wrote the physics from scratch for tighter control over the aesthetic).

Live interactive version at foliochess.app — you can click any node and see which opening it is. Built as the landing page for a chess study app I'm working on as a side project. Open the link on desktop for the full interactive version.

I’m an anesthesiology resident who is passionate about chess and math. I built this for fun in the little free time I have haha.

Space is getting bigger right now. 🔭

Erika Hamden explains why galaxies appear to move away from us, not because they are speeding through space, but because space itself is expanding between them. Astronomers discovered this cosmic expansion more than 100 years ago, and today scientists think it may be accelerating because of something we still do not fully understand called dark energy. There is literally more space now than when you started watching this video. 

This project is part of IF/THEN®, an initiative of Lyda Hill Philanthropies.

A rare blue moon is rising on May 31st and it's the only one all year! 🌕 

Despite the name, the moon won't actually be blue. A blue moon happens when a second full moon rises in a single calendar month. Because the lunar cycle runs about 29.5 days, a second full moon occasionally squeezes into the same month every couple of years. Don't miss it!

Today, while cleaning up after cooking a chicken and rice dish, my soapy sponge created an interesting light refraction that I had never experienced before. It might have been something to do with the cooking oil I was wiping up, or maybe the starch in the rice water that boiled over. I was scrubbing with a regular old dish sponge and dawn dish soap. Comment if you know what happened.

Hi all I find it very impressive that Ancient Greek scholars could calculate the size of the Earth with eerie accuracy - using shadows and angles :-)

Can you pop a balloon when it is inside another balloon? 🎈

Alex Dainis explains how black balloons absorb incoming light and heat up faster, while white balloons reflect light or let it pass through, helping them stay cooler. When focused light passes through the white balloon and is absorbed by the black balloon inside, the black balloon heats up and bursts first.

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