Controls
[U] to undo the last move
[R] to reset
[WASD] rotate graph
[arrows] to pan
[O] to color nodes by their opening
[click] on a node!

This is a low-information, search-free weak solution of Connect-4. With nodes, it represents a small amount of information one may 'memorize' in order to always win, as player 1 (red). Terminal nodes contain 'steady state diagrams', a language expressing weak solutions of sufficiently developed positions.

Detailed Explanation
Memorize it with Anki
Strong Solution for this position