[cuken]

There is a help button in the top right that shows you need to focus on the circle node connectors to "solve' the problem.

At least for the first example:

You have a blue box labeled xt with a single node connector at the top. You have a purple box labeled ht with a node connector at the top and bottom. You have a green box labeled Yt with a node connector at the bottom.

The game tells you at the top you have 3 edges remaining.

Dragging a line from one node to another, releasing, and it turning green means you have placed a "correct" connection.

i.e. xt -> ht [bottom] will give you a green line.

Repeat until you have all edges solved for.

It's not spelling it out for you, but once you complete the "game" you'll at a very high level understand the moving pieces within the network, and the "flow" of data.

[dkersten]

The help didn’t exist originally: https://news.ycombinator.com/item?id=40430064