1v1 Battle Arena

Pick a level for the battles you start — the invited player sees it before accepting. Every question is an output-prediction puzzle: read the code, choose what it prints. A level with too few published problems is greyed out, so an accepted invite can never dead-end.

A battle invite only lands while the other player has PyDebug open — the green dot means they are here right now. Offline players show no dot and their invite button stays switched off.

Looking for players…