Fleet Grid· Advanced

Goal

Find all hidden ships on the grid using row/column number clues. The game completes when every ship is correctly placed.

How to Play

  • In Ship mode (⚓), tap a cell to place a ship segment. Drag to fill multiple cells at once.
  • Switch to Water mode (💧) to mark empty ocean cells.
  • Numbers beside rows/columns show how many ship cells are in that line. Numbers turn green when satisfied.
  • Pre-revealed hint cells show part of a ship or confirmed water — use them as starting clues.
  • When a row/column's ship count is fully satisfied, remaining empty cells are auto-filled as water.

Ship Shapes

Rounded ends and flat sides on hint cells indicate which part of a ship you're looking at — distinguishing ends, middles, and single-cell ships.

123Water

Completed Example

  • Row/column numbers must be exactly satisfied by placed ships.
  • Ships are always straight lines (horizontal or vertical) — never bent.
  • Ships cannot touch each other, even diagonally (minimum 1-cell gap).
  • You must place every ship in the fleet exactly.
  • Ship shapes (rounded ends, flat middles) hint at their orientation.
  • Once all ships are correctly placed, remaining water cells are auto-filled — you don't need to mark every water cell.

Tip

  • Fill rows/columns with count 0 as all water first — easiest starting point.
  • Diagonal neighbors of hint ship cells are always water.
  • If remaining unknown cells in a line equals the remaining ship count, they are all ships.
  • Use auto-water to your advantage — place confirmed ships first and let water cascade automatically.

Fleet Grid puzzles are constraint satisfaction problems combining logical deduction with working memory, effectively training deductive reasoning and planning skills.

  • Kyllonen, P. C., & Christal, R. E. (1990). Reasoning ability is (little more than) working-memory capacity?! Intelligence, 14(4), 389-433.