About Bordlr

Bordlr is a free daily geography game by Shwrk. You're given two regions and you connect them through the lands between — no account, no download, playable in any browser.

What counts as a border in Bordlr?

Under every puzzle is a graph of who borders whom. For countries it starts from strict land borders, then adds exactly three permanent fixed crossings that are drivable or walkable over negligible water: the Øresund Bridge (Denmark ↔ Sweden), the King Fahd Causeway (Bahrain ↔ Saudi Arabia), and the Johor–Singapore Causeway (Singapore ↔ Malaysia). Ferry routes are deliberately excluded — that keeps the "connected by land" rule honest, and it's why island nations never appear inside a chain.

US-state puzzles use the same idea with state lines, for all 50 states plus DC.

Where does Bordlr get its data?

Country names, borders, and coordinates come from the open mledoze/countries dataset. Map shapes are Natural Earth, via world-atlas and us-atlas. Distances are great-circle measurements between region centers.

Explore the data

The same graph the game runs on powers our reference pages: the country borders atlas, the US state borders atlas, and featured border paths between far-apart places.