Everything you need to level up your competitive programming skills
Face off against opponents in live coding duels. Race to solve problems faster and more efficiently.
Practice with thousands of curated problems from Codeforces, ranging from beginner to expert level.
Climb the global leaderboard with our ELO-based rating system. Track your progress over time.
Our matchmaking system pairs you with opponents of similar skill level for fair, competitive matches.
Target specific topics and difficulty levels to improve where you need it most.
Get immediate results with our fast judge system. Know exactly where you stand after each battle.
Get started in seconds and jump into your first battle
Sign up in seconds with just your email. No complicated setup required.
Click 'Find Battle' and we'll match you with an opponent at your skill level.
Race to solve the problem first. Write clean, efficient code to claim victory.
Win battles to increase your rating and climb the global leaderboard.