Battleships is a pretty common puzzle on the World Puzzle Championship tests. If this is new to you, you may enjoy Nikoli's broader range of puzzle sets listed

Battleships is a pretty common puzzle on the World Puzzle Championship tests. If this is new to you, you may enjoy Nikoli's broader range of puzzle sets listed on wikipedia https://en.wikipedia.org/wiki/Nikoli_(publisher)#Nikoli_puzzles https://en.wikipedia.org/wiki/Nikoli_(publisher)#Nikoli_puzz... A number of them are implemented via SGT puzzles https://www.chiark.greenend.org.uk/~sgtatham/puzzles/ https://www.chiark.greenend.org.uk/~sgtatham/puzzles/