Hi Codeforces!

A small update to our previous posts about VoidHub.

I, together with AdhamAfterMidnight, have added a new problem source to the platform: VH (VoidHub). ## VH Problems

VH now appears beside Codeforces, Online Judge, HackerRank, and Auto Mix when creating a 1v1 room.

Unlike external sources, VH problems are judged directly inside VoidHub. This makes the submission flow much faster: compile, run, and receive the verdict without waiting for an external judge.

The problems are written specifically for VoidHub and include:

• clear statements and samples
• private tests
• difficulty ratings and tags
• fast in-platform judging
• support for ranked and unranked 1v1 rooms

We are building this set gradually, with problems across different difficulties and topics. The goal is to make VH a reliable source for quick duels while keeping the problems interesting enough to be worth solving.

How it works

When creating a room, simply choose VH (VoidHub) as the problem source.

The room can still be ranked or unranked, and the normal duel modes work as usual. Problem selection also avoids problems already solved by either player, so the match stays fair.

This is an update to the existing VoidHub experience, not a replacement for Codeforces, Online Judge, or HackerRank. We still love practicing through original platforms, but having a native source gives us more control over problem selection, room speed, and the overall 1v1 experience.

You can try it here:

https://voidhub.co

Feedback, bug reports, and problem ideas are always welcome in the comments.

Thanks for reading!