Real-time 1v1 coding battles. Get matched by rating, solve the same problem, and the first accepted solution takes the win.
Hit Start Battling and join the live queue.
We pair you with someone at your skill level.
Same problem, same clock, your language of choice.
Pass all hidden tests first and take the rating.
Watch your opponent's progress live as you race to the finish.
Tight rating windows keep every match competitive.
Rating history, win rates and per-language insights.
Climb from Beginner to Master and earn your spot.