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The Daily City Distance Challenge is a free daily geography game. Every 24 hours at midnight UTC, a new pair of top-100 world cities is revealed. All players worldwide see the same pair, making it a shared daily puzzle. Your goal is to estimate the great-circle ("as the crow flies") distance between them in up to three attempts, with directional feedback after each guess.
| Error vs true distance | Base score | Rating |
|---|---|---|
| ≤ 5% | 1000 | ★★★★★ Perfect |
| ≤ 10% | 900 | ★★★★☆ Excellent |
| ≤ 20% | 750 | ★★★☆☆ Great |
| ≤ 35% | 500 | ★★☆☆☆ Good |
| ≤ 50% | 300 | ★☆☆☆☆ Keep practicing |
| > 50% | 100 |
Each extra attempt beyond the first deducts 10 points (minimum score: 50). A perfect first guess earns the full 1000 points.
It is a free daily geography game where a new pair of world cities is revealed every 24 hours. Your goal is to estimate the great-circle ("as the crow flies") distance between them in up to three attempts, with high/low feedback after each guess.
Your best guess earns a base score by percent error: ≤5% = 1000 pts, ≤10% = 900, ≤20% = 750, ≤35% = 500, ≤50% = 300, beyond = 100. Each extra attempt beyond the first deducts 10 points, with a minimum score of 50.
Each day's city pair is hand-curated in our challenge schedule, so every player worldwide sees exactly the same two cities on the same date.
Your streak increments by 1 every time you complete a challenge on consecutive calendar days (UTC). Missing a day resets it to 1. Your longest streak ever is also tracked.
Great-circle distance is the shortest path between two points on a sphere. We compute it with the Haversine formula using Earth radius = 6371 km. This is the "as the crow flies" air distance, not driving or flight-routing distance.
The current version shows today's challenge only. Your personal history of past scores is stored locally in your browser for up to 90 days.