Logic Masters Deutschland e.V.

You return as our navy's finest admiral. The enemy is rebuilding their fleet near the Octo Islands. Once again, we need you to locate their ships so that we may send them to the bottom of the ocean.

Happy hunting!

Rules

Normal Sudoku rules apply. Digits cannot repeat inside a cage. The small clue in the top left of a cage, if given, indicates the sum of the contained digits.

There are exactly five enemy ships. There are two ships that are 3 cells long, and one ship each of lengths 2, 4, and 5. See list below.

Cells in the given cages (green) are land. All other cells are sea. Ships can only occupy sea cells.

Ships cannot touch each other, not even diagonally.

Each ship acts like a cage with a sum of 15.

Ships are unambiguous, and the negative constraint applies. In other words, any line of 2, 3, 4, or 5 sea cells which sum to 15 MUST be a ship. Similarly, any line of sea cells which cannot be a ship CANNOT sum to 15.

Play on CTC

Find the original Battleships puzzle here.