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Bridges

Connect all numbered islands with straight bridges into one united network.

Start level 1 100 levels

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How to play

  • Draw straight horizontal or vertical bridges connecting circular islands.
  • The number in each island specifies the exact total number of bridges connected to it.
  • At most two bridges can run between any pair of islands (bridges may be single or double lines).
  • Bridges cannot cross other bridges, pass diagonally, or pass through another island.
  • All islands must end up connected together into a single continuous network (no isolated island groups).

Island Bridge Counts & Max 2 Bridges

Every island must connect to exactly as many bridges as its number indicates. At most two bridges can run between any pair of islands.

3333
✓ Correct All four islands have exactly 3 bridges connected (single and double lines), matching each island's number.
3333
✗ Wrong Under-connected islands: the top bridge only has 1 line, leaving islands (0, 0) and (0, 3) with only 2 bridges instead of 3.
3333
✗ Wrong Over-connected island: island (0, 0) has 4 bridges attached (two horizontal, two vertical), exceeding its number of 3.

No Crossing Bridges & Single Connected Network

Bridges can never cross other bridges, and all islands must be connected together into a single continuous network.

2222
✓ Correct All four islands are connected into one single network by a ring of single bridges without any crossings.
✗1111
✗ Wrong Crossing bridges: the vertical bridge from (0, 2) to (4, 2) crosses over the horizontal bridge from (2, 0) to (2, 4). Bridges can never cross.
2222
✗ Wrong Disconnected network: the top pair and bottom pair satisfy their numbers (2 bridges each), but they form two isolated networks instead of one connected whole.
A small Bridges, solved.