Duel Math — Competitive Mental Math Arena

Challenge real players to live 1v1 math duels, train across 16 cognitive games, and earn a verified cognitive profile. Free to play.

How It Works

• Create a free account: Sign up in seconds with Google or email. No download, no credit card. Works in any browser.
• Train or duel: Play any of 16 cognitive games solo or jump straight into the duel arena to face a real opponent.
• Start a Ghost Battle: Challenge a friend. If they can't connect, play the bot instead — your run is recorded and sent as a Ghost Battle.
• Unlock your cognitive profile: Play enough matches and the app builds a verified 10-dimension profile from your gameplay.

Key Features

• Live 1v1 Duels: Challenge real players to 60-second math duels in real time.
• Async Ghost Battles: Play against your friends' ghost avatars whenever you're free.
• Cognitive Profile: Unlock a 10-dimension profile across processing speed, working memory, and more.
• Daily Leagues: New math and logic challenge sets every day across 12 domains.
• Elo Rating System: The same statistical rating model used in competitive chess.

Frequently Asked Questions

What is Duel Math?

Duel Math is a competitive math arena with 16 cognitive training games, live 1v1 ranked duels, and async Ghost Battles.

Is Duel Math free?

Yes. All 16 arena games, live 1v1 ranked duels, Ghost Battles, and the full cognitive profile are completely free.