Dr. Sudoku Prescribes #44 – Battleship Sudoku
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between number placement, ship placement, and shading modes. The shading mode in gray, which numbers can be written on top of, may work better than default ship placement.)
Theme: Even Steven; the fleet has only certain kinds of numbers.
Rules: Standard Battleship Sudoku rules.
Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 6th column from top to bottom.
Time Standard: Battleship Sudoku Grandmaster = 1:30, Master = 2:15, Expert = 4:30
Solution: PDF
5:39!