Real-time 1v1 mental arithmetic duels. Elo-rated matchmaking. Prove you're the fastest mind on the planet.
Every detail designed to test genuine human skill
10 rounds of rapid-fire arithmetic. Tap your answer in 5 seconds. Speed and accuracy both count.
Bracket-based matching within ±100 Elo. Win streaks trigger aggressive rating jumps. No bracket camping.
Tap-only answers. 5-second windows. Response time logging. Statistical anomaly detection. Cheaters get flagged.
Global rankings by Elo. Track your win rate, best streaks, and match history. Climb the ladder.
Designed for your phone. Large tap targets, instant response, smooth animations. Play anywhere.
No opponents online? Practice against the Duelmind Bot. Sharpen your skills before going live.
Pick a username. You start at 1000 Elo. Your journey begins.
Our matchmaker finds someone in your Elo bracket. If no humans are around, you'll face the bot.
10 rounds of mental math. Tap the right answer before time runs out. Faster = more points.
Win to gain Elo. Streak wins boost your rating faster. Reach the top of the global leaderboard.
Join the arena. First duel is free. Always.
⚡ Play Now — It's Free