I finally finished another set of 3 of these puzzles that play with some different aspects of symmetry, clue minimization, and increased difficulty. The first of these three was posted earlier this week under an "Easy As Pi" name given the puzzle's obvious theme. I've deleted that old entry as it has now been absorbed into this one. The next two that follow are likely even harder.

For those unfamiliar with my Battleship Sudoku, please refer to this earlier post. The rules here are the same although now some ship placements are given as clues in addition to numbers. All given numbers can be considered seas.

For this set of three puzzles, I've erred on the side of very hard and I apologize if you find this frustrating; I can write easier puzzles, and will likely do so and send some off to GAMES or another publisher, but I wanted some more difficult examples here on my blog. All of these can be solved using logical steps forced by either the battleships, the sudoku, or both combined.