DKM Yubotu (also known as BattleShip Puzzle or BattleShip Solitaire) is logic puzzle where you need to determine where a fleet of ships are placed in a 10x10 grid. In the traditional puzzle, the fleet consists of ten ships: one battleship, two cruisers, three destroyers and four submarines. In addition, DKM has introduced three variations: A fifteen ship fleet in a 12x12 grid, a twenty ship fleet in a 14x14 grid and a twenty five ship fleet in a 16x16 grid.

The ships may be placed horizontally or vertically in the grid but no two ships will occupy adjacent grid squares, even diagonally.

Nearly all puzzles start with a few squares already filled in to get you going.

The digits along the side and below the grid indicate the number of grid squares in the corresponding rows and columns that are occupied by ships.

All puzzles are solvable by pure logic alone - no guessing required.

There are twelve new puzzles each day, one at each difficulty level for each fleet size.

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How to play   Tutorial

Daily Challenge

Participate in the daily challenge to try make it on the leaderboard. Each day (US Eastern Standard Time) you can play the same puzzle as everyone else.
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A paperback book of Yubotu puzzles is now available from Amazon.



If you are new to Yubotu, you may like to watch this introductory video that takes you through solving an easy puzzle.