Henry Ernest Dudeney/Puzzles and Curious Problems/258 - Deploying Battleships

by : $258$

 * Deploying Battleships
 * Ten battleships were anchored in the form here shown.


 * Dudeney-Puzzles-and-Curious-Problems-258.png


 * The puzzle is for four ships to move to new positions (the others remaining where they are)
 * until the ten form five straight rows with four ships in each row.


 * How should the admiral do it?