co

mmon.concept

Learn what no course teaches.

Start free →
Print ? of 360

Courses are written for what lots of people want to learn. What you want is usually more specific than that, so start by saying exactly what it is, as specifically as you like. These are mine:

GoPlay Go at an amateur dan level.Try →
DrawingSketch well enough that, with image-to-image models, I can make anything I can picture, in fine detail.Try →
Explainer videosMake explanatory videos that are actually entertaining: 3Blue1Brown, Sheafification of G, old Fireship.Try →
Classical ChineseRead and translate the Daoist and Buddhist classics, and talk to LLMs in fewer tokens.Try →
Category theoryCategories for the Working Mathematician, understood both as a functional programmer and as a mathematician.Try →
CWrite terse, macro-heavy C the way Arthur Whitney and ngn do.Try →

— mlegls

Then you learn it by doing the real thing, not a syllabus about it: you play real games, build the actual program, hold the conversation. The tutor watches, steps in less as you improve, and notes what you manage on your own:

Playground · chess no hints this game

Game 14, against the club bot

21. h3 Rfe8
22. Ne4 Qd7
23. Nf6+
DEMONSTRATED
3

forks and pins

23. Nf6+ — the knight forks king and queen, found with no hint.

Game 14 · unaided · in a real game

Two unaided successes in the last three attempts made it demonstrated.

Where you start changes the route. Two people both want to read the Daoist and Buddhist classics: one reads modern Chinese, the other learned kanbun at school in Japan. The tutor plans each map from what that person already knows, so a head start counts, even an unexpected one:

Reads modern Chinese

✓characters
✓modern grammar
old meanings of familiar words
之 乎 者 也
terse parallel lines
Buddhist terms
Daodejing
Zhuangzi stories
Heart Sutra

Did kanbun at school in Japan

✓kanbun reading marks
✓kanji
✓temple vocabulary
reading without marks
✓之 乎 者 也
Buddhist terms
Daodejing
Zhuangzi stories
Heart Sutra

not yetprobably known✓shownnextgoal

Your map works like a skill tree in a game, except the skills are real. A node lights up once you’ve shown you can do it, so you always know how far you’ve come and what opens next. If the tree is wrong, change it.

Mission · last Session Tue 21:40 · 3 of 9 shown

Read the Daoist and Buddhist classics

Next: the old meanings of familiar words, then 之 乎 者 也.

✓✓✓4Old meanings of familiar wordsContinue →

And once you’ve got it, share it. If you learned something unusual, someone else will want it too, and what’s worth learning now changes faster than any curriculum can follow. It’s up to curious people to share the frontiers.

Hub · Map · 3.3.0 · Aug 19, 2026

Analects reader

by Lin

The first ten chapters, with grammar Nodes and cards for each particle.

Install →
✓學而 · ch. 1
之 as object pronoun
也 at sentence end
之 between nouns
✓而 joining clauses

48 Nodes · 212 cards · 10 readings

Browse the Hub →

It’s free to start, with two Missions, and $19 a month for as many as you like. Pay at cost for model use on either plan, or bring your own key.

Free
$0

Two Missions.

Model usage at cost.

Start free →
Full
$19/month

Unlimited Missions.

Model usage at cost.

Subscribe →

or $190 a year: two months free

Model priceat cost, no markup
To start$5 of usage
Top-upsFX and payment fees only
Your own keybilled by your provider
Paymentcard