Blocked Crossing
Easy
Used by Smart Hint
Bridges can never cross — a connection that would cross an existing bridge is impossible.
- Existing bridge
- Connection ruled out
- Islands that establish the pattern
How it works
- A bridge already runs between the two side islands.
- Bridges can never cross, so the top and bottom islands can't be connected to each other — that path is dead.
- Their bridges must come from other directions instead.