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

Puzzles and Curious Problems by Henry Ernest Dudeney: $258$

Deploying Battleships

Ten battleships were anchored in the form here shown.

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?

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Moving Counter Problems: $258$. -- Deploying Battleships
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Combinatorial & Topological Problems: Point Alignment Puzzles: $440$. Deploying Battleships