DWG-106.1.04
Bridges #4 · Easy
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About this puzzle
8 islands on a 7×7 grid need 10 bridges between them. The biggest island number is 5.
2 islands need at least one bridge to every neighbour.
Where to start
3 islands take the maximum their neighbours allow, so every connection there is a double bridge.
A good first move: the island with the number 2 at row 6, column 5, which can see one neighbour.
Island arithmetic is enough here: compare each number with the neighbours it can see.