$ cat writeup.md…
$ cat writeup.md…
broncoctf2026
Task: OSINT puzzle giving three devil-themed clues that each identify a city; goal is the floored centroid of their Wikipedia coordinates. Solution: recognize the Bermuda (Devil's) Triangle — Bermuda, San Juan, Miami — via landmark and song-lyric identification, then average the three Wikipedia lat/lon pairs and floor to bronco{REDACTED}.
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Rumors speak of a treasure buried in the center of a specific triangle. Three people have sent me locations where they are, but there's a problem. I think they're all possessed by the devil.
All they gave me 3 different pieces of information:
- I'm at a place called Devil's Isle
- I found myself near a haunted sentry box
- This one just went 'Nunca podrán dominarla La buena música no engaña'
The coordinates of the cities themselves on Wikipedia should give me a decent estimate.
Flag: bronco{XX(N or S),XX(E or W)}, Rounded down to the nearest whole number after all of the calculations. Example: bronco{06N,66E}
English summary: three devil-themed clues each resolve to a city. The three cities are the classic vertices of a famous "triangle". Take each city's Wikipedia coordinates, compute the geographic centroid (arithmetic mean of the three lat/lon pairs), floor both values, and format with N/S and E/W hemispheres.
The core insight is thematic: a "specific triangle" whose points are all possessed by the devil is the Bermuda Triangle, popularly known as the Devil's Triangle. Its three classic corners are Miami, San Juan (Puerto Rico), and Bermuda. Each clue names one of these vertices.
Clue-by-clue resolution:
...
$ grep --similar