Bridges #502 · 7×7

• 7×7grid
• 10islands
• 12bridges
• 3double routes

Bridges #502 is a 7×7 grid at easy level with 10 islands. The solution lays 12 bridges along 9 routes, and 3 of those routes carry a double bridge. The largest number on the map is 5.

You can start without any guessing: 3 islands have a number equal to or one below twice the neighbours they can see, so every one of those neighbours gets at least one bridge.

3 islands carry a 1. Two of them may never be linked to each other, because that pair would be cut off from the rest of the map.

2 islands sit in a corner of the grid, where it can see at most two neighbours: a good second place to look.

Easy grids can be finished by counting neighbours alone. If you get stuck, look for islands whose remaining number equals what their open neighbours can still take.