Inspired by Blitz Cup: Introducing Blitzforces, a New Dueling App!
Hello Codeforces!
Like many of you, I've always been a huge fan of the fast-paced, high-adrenaline format of contests like the Codeforces Blitz Cup. There's a special kind of excitement in those quick, head-to-head battles that you don't always get in a standard 2-hour contest.
That feeling inspired me to create something new for the community. I wanted a simple way to challenge a friend to that same kind of quick duel, anytime, on any day.
So, I built Blitzforces. https://blitzforces.vercel.app
It's a web application designed for one thing: to let you and a friend quickly set up a room, pick your problem parameters, and duel it out in real-time.
What Can It Do?
My goal was to keep it simple and focused on the duel experience. Here are the core features so far:
Instant Room Creation: Create a private room with a unique code in seconds.
Custom Challenges: Set the number of problems, difficulty range (e.g., 1200-1600), and a timer for the match.
Smart Problem Selection: The app fetches problems from the Codeforces API that fit your criteria.
Real-Time Scoreboard: Watch the scores update live as you and your opponent solve problems.
Live Chat: Because what's a duel without a little friendly banter?
Here’s a sneak peek of the interface:
How It's Built
For those who are curious about the tech, I built this project as a way to learn and grow as a developer. The tech stack is:
Backend: Node.js, Express, MongoDB, with Socket.IO for all the real-time magic.
Frontend: React (using Vite) and Bootstrap.
Building it has been an incredible learning experience, from setting up the real-time infrastructure to deploying a full-stack application.
I Need Your Help!
This is a passion project, and it's still in its early stages. The best way to make it better is with feedback from the amazing Codeforces community.
I would be incredibly grateful if you could try it out and let me know what you think.
What features are missing?
Did you find any bugs? Open your issues at:https://github.com/Hemaprakash123/cfDuel
Is there anything that could make the experience better?
Please leave any and all feedback in the comments below. Thank you for your time, and I hope you enjoy the duels!
You can try it out here: https://blitzforces.vercel.app
Important Note::
If you face any loading issues please wait for 30-60 seconds
If you want to collaborate and have a good knowledge in this you can message me directly or mail me :mikeytoman08072004@gmail.com








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