Give your idea a keyboard.
In the Duello app, open Home → Code → Code Problem, then scan the QR code in the web editor. Write your solution and see the judge evaluate your tests.
Open duel codingDUELLO BATTLES · LIVE 1V1 DUELS
Duello.
Solve faster than
the person across
from you.
Duello matches you against a real opponent for rapid-fire rounds of mental problem solving. Two minutes a round, a rating that moves every time.
12:40ROUND 3 / 5
0:47
🤖You3
VS🦊arjun2
HOW IT WORKS
From your first tap to victory.
AUTOPLAY DEMO
Step into the arena.
Find a rival, solve a quick problem, and take the win. Watch a complete duel unfold.
- Enter the arenaCompetitive Intuition. Quick thinking, head to head.
- Find your opponentA scan for players near your rating.
- Solve and submitFind the fewest jumps. Enter your answer before your rival.
- Claim your victorySee your score, accuracy, and rating gain.
Loops automatically · simulated duel.
Play starts your opponent search. You can pause and try it yourself.
YOU18
@you
◆ 2423 ›28.1k XP
MENTAL
COMPETITIVE
INTUITION
Face off in rapid-fire judgment rounds.
Test your instinct.
123 players
Daily ChallengePlay 5 battles
◷ 09:58:29ϟ 100 XP◆ 20♔ QUEST0 / 5
LET THE BATTLE BEGIN
MENTAL• 933 rating
Competitive Intuition
Competitive Intuition
Finding opponent
Scanning players near 933 RP
OPPONENT FOUND
Minimum Jumps
One problem. One winner.
YOUYou★ 933EXPLORER
VS
RIVALArjun★ 940EXPLORER
01 PROBLEM30 SEC100 POINTS
The same question.
The same chance to win.
3
GET READY0You · 933
0Arjun · 940
FINAL RESULT
Victory!
Quick thinking. Well played.
YOU1001 correct
ARJUN00 correct
ACCURACY100%1 of 1 correct
SOLVING TIME3.4sOne quick problem
YOUR SOLVE3.4s
Problem 1 · Minimum JumpsRATING · EXPLORER948 +15
XP EARNED+100
SUBJECTS
One arena, for now.
Duels run on mental problem solving: arithmetic, patterns and reasoning you work out in your head against the clock. More subjects follow.
◇
Mental problem solving
LIVE NOW
+
More arenas
IN THE WORKS
FROM INTUITION TO ALGORITHMS01 / DUEL CODING 02 / ADVENTURE MAPS · PREMIUM
Small steps. Real solutions.
Explore the adventure maps on your phone, then turn your ideas into code on your computer.
Follow your curiosity.
In the Duello app, open Maps → Code Adventure (Premium), then scan the QR code in the web editor. Work through decisions, arrays, math, and greedy algorithms.
Explore adventure codingRANKS
This week's top duelists
Ranked by weekly wins · Competitive Intuition
Loading this week’s duelists…
Your next challenge starts here.
Get Duello Battles on Google Play. Start a duel on your phone, build your problem-solving skills, and take your ideas to the coding editor.
Duello Battles- Open Duello Battles on Google Play.
- Install the app and sign in.
- Choose a duel or explore the adventure maps.
Scan to open Google Play on your phone.New to Duello?
What is Duello?
Duello Battles is a problem-solving app with head-to-head duels and adventure maps. Practice quick thinking on your phone and write coding solutions on your computer.
Where can I download the app?
Install Duello Battles for Android from Google Play.
How do I connect to the coding editor?
Open Duello Code on your computer. For duels, go to Home → Code → Code Problem in the mobile app. For adventure, go to Maps → Code Adventure (Premium). Open the scanner, scan the QR code shown on your computer, and confirm the connection.
Does adventure coding require Premium?
Yes. Adventure coding is included with Duello Premium and uses a separate connection from duel coding.
CONTACT
Bug, idea, or a question?
✉GENERALhello@duellobattles.com⚙APP SUPPORTsupport@duellobattles.com
DESK HOURS
Mon–Fri, 10:00–19:00 IST
Bengaluru, India
Bengaluru, India