Deduce the hidden positions of five warships using only row and column counts. No guessing — pure deductive logic.
Every puzzle has one unique solution reachable by deduction alone. No random guessing required.
Carrier, Battleship, Cruiser, Submarine, Destroyer — 17 ship cells to hunt on a 10×10 ocean.
Every puzzle pack exports as a print-ready PDF with answer keys — take it anywhere, no screen needed.
Reproducible seeds mean every puzzle is shareable, verifiable, and part of a numbered series.
Battleship Logic plays like Minesweeper crossed with Sudoku — the numbers tell you how many ship segments are in each row and column. The rest is up to you.
Each row and column header shows the total number of ship segments hidden in that line. A zero means the entire row or column is open water.
Click cells to mark them as ship (gold) or miss (dot). Ships are always straight lines and may not touch each other diagonally on Medium and above.
You must place all 5 ships — Carrier (5), Battleship (4), Cruiser (3), Submarine (3), and Destroyer (2) — so every count is satisfied exactly.
When every ship cell is correctly marked, the fleet is sunk. The player tracks your accuracy, time, and move count — compete against yourself across packs.
Naval logic deduction at its finest. Hunt five hidden warships across a coordinate grid using only the row and column fleet counts as your sonar. Available in three grid sizes and four difficulty levels, with printable puzzle books exported directly from the BLOS Print Platform.
Naval deduction — find the fleet using row & column counts.
Light Up — illuminate every cell with numbered light bulb clues.
Binary logic — fill a grid with 0s and 1s following three strict rules.
Math meets Sudoku — satisfy arithmetic cage targets while keeping rows unique.
Bridges — connect numbered islands with the exact count of bridges.
Shade numbers so no value repeats in a row, no shaded cells touch.
Cross-sum puzzles — fill digits 1–9 to match every horizontal and vertical clue.
Sudoku with arithmetic cages — no digit repeats, every cage sums correctly.
Draw a single loop through white and black circles following direction rules.
Connect sequential numbers in a continuous path through the grid.
Join the BLOS puzzle family. Free to play, no account required, works on every device. New packs added regularly.