Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works
🧩

Joint & Conditional Entropy Sprint

Sum -p(x,y)log2 p(x,y) over a joint table for H(X,Y), then subtract off H(X) for H(Y|X) -- the chain rule, worked both ways.

⏱️ 90s
▶ Log in to play

← Back to the arcade