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

🏗️

Build and Tear Down

Members, bases, stack unwinding, unique_ptr ownership and copy-vs-move counts: who is built, moved and destroyed, in what order.

🎯 5 in a row 🚫 no clock

▶ Log in to play

← Back to the arcade