http://codeduel.io -> Click to play!

This project got second place at the Boot.dev 2025 hackathon (https://blog.boot.dev/news/hackathon-2025/)

Code Duels - Real-time Competitive Programming Game

A multiplayer competitive programming game where players battle by solving coding challenges in real-time. Players take damage when their opponent solves problems correctly, with harder problems dealing more damage.

Game Overview

Players compete in 1v1 code duels where they:

• Select coding problems of varying difficulty (Easy, Medium, Hard)
• Write Python solutions in real-time
• Deal damage to opponents by solving problems correctly
• Turn on hard mode to challenge your focus
• Spectate matches of your friends
• Track your progress
• Win by reducing opponent's health to zero

Tech Stack

Frontend:

• React.js with React Router
• Material-UI for components
• Monaco Editor for code editing
• Socket.io-client for web sockets

Backend:

• Flask with Flask-SocketIO
• PostgreSQL for data persistence
• Docker for secure code execution

Setup Instructions

Prerequisites

• Docker and Docker Compose
• Node.js
• PostgreSQL (handled by Docker)

Setup

1. Navigate to root directory:

2. Start with Docker Compose:

   docker compose up --build

Deployment Steps (On Google Cloud)

blog. 0. Get on GCP terminal

1. npm install -> npm run build (in /client) -> production ready in /build
2. sudo apt-get install nginx

server { listen 80; root /home/{name}/code_off/client/build; index index.html;

location / ( try_files $uri $uri/ = 404; ) } 4. sudo apt install libpq-dev python3-dev 5. manually create psql database on server -> using init.sql 6. set up proxy: systemd -> when server starts back up - will run exec 7. gunicorn -k gevent -b 127.0.0.1:5001 app-gunicorn:app

Acknowledgements:

• https://www.youtube.com/watch?v=3WfegWZzxek&pp=0gcJCfwAo7VqN5tD - hard mode sound track
• https://www.pinterest.com/pin/760897299536844192/ - hard mode visualization
• https://x.com/codeduel - this guy because we accidently took his domain lol