Fudeto

In 1736, Swiss mathematician Leonhard Euler studied the Seven Bridges of Königsberg: could you cross every bridge exactly once? His answer — based on the parity of vertex degrees — founded the field of topology.

290 years later, Fudeto turns Euler's question into your daily puzzle.

Every day at midnight UTC, a graph of 6 to 20 vertices appears on your screen. Trace every edge in one stroke — and players around the world face the very same graph.

A mathematical guarantee: Euler's 1736 theorem ensures every puzzle has a solution. The graph is generated live from today's UTC date — different every day, identical worldwide.

— What makes Fudeto different —

· Zero images, zero music, zero fonts. Every dot, line and colour is computed live in pure code.

· Live Pulse — a faint heartbeat along the bottom of the screen while you play.

· Solve Stillness — a held moment of quiet when you solve, before the next prompt fades in.

· Render Fingerprints — every graph is rendered subtly, uniquely.

— Content that keeps going —

1. The daily ritual. Open the app each day. One graph — the same one as your country and the world.

2. Practice mode. Solve today's Daily to unlock 24 hours of unlimited Practice — chapters of steadily rising difficulty.

3. World Cities. Clear Practice to unlock 24 historic Euler / bridge cities, 192 levels in all (Königsberg, Venice, Edo, Suzhou, Manhattan…).

4. Country Season. Each week, every puzzle you solve adds to your country's score on the global board.

5. Fudeto Pro. An optional subscription with two conveniences — unlimited Practice anytime, and cross-device restore.

— What Fudeto won't do —

· No ads of any kind — no banners, no interstitials, no rewarded videos. None.

· No free-trial dark patterns. A clear monthly price — subscribe or don't.

· No "share to unlock" coercion. Sharing is purely opt-in.

· No account needed to play. Sign in with Apple/Google only if you want cross-device sync.

— On craft —

Fudeto is built quietly. We don't shout in the copy. The puzzle is the message.