Count the Line
Work out every combination of ships that could make this line's number — the ones they all share are ship, the ones none of them use are water.
How it works
- 1This row still needs 3 ship cells, and just two ships are left in the whole fleet: one 2-ship and one submarine.
- 2Both have to fit in this row without touching each other. There are only two ways that works: the 2-ship on the left with the submarine at the right end, or the submarine at the left end with the 2-ship on the right.
- 3Both ends are ship either way — only the middle two cells are still in question.
- Ship segment
- Cells that establish the pattern
- Where the conclusion lands