Logic Masters Deutschland e.V.

This is a hybrid of Nurikabe and Hashiwokakero.

RULES:

• Shade some cells (representing "water") such that:
  • The water cells form a single orthogonally-connected region, with no 2x2 areas entirely shaded.
  • Each orthogonally-connected group of unshaded cells (or "island") contains exactly two numeric clues (the two clues may occupy the same cell, indicated with a "~" between them), and one of those clues is the number of cells in that island.
  • All clues are part of islands.
• The other clue in each island is the number of bridges connecting that island to other islands.
  • A bridge is a straight line from a cell on one island to a cell on another island, with only water cells in between. Bridges cannot change direction, cannot cross one another, and cannot start or end on the same cell as another bridge.
  • The bridges must join all the islands into a single network, such that you could travel from any island to any other island by crossing a series of bridges.
  • Each pair of islands has either 0, 1 or 2 bridges connecting it. An island may have bridges to any number of different islands.

Penpa link (main puzzle)

Play the 7x7 example puzzle