Draw on Edges: OFF Panel: ON

     

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Selection: battleship_G
Variation of standard Sudoku rules: Insert a letter from A to H (or leave a blank) so that each letter appears exactly once in each row, column, and bold region.

Also, as in Shape Sudoku, there are some lettered shapes given beneath the grid that must be put in their proper places inside the grid; and, as in Battleship Sudoku, their proper places are indicated only partially. (Partial shape clues in the grid are not lettered but do not necessarily indicate the location of blanks.) The shapes can be rotated, and can touch on an edge but cannot overlap.

For automatic solution checking, all CAPITAL LETTERS must be entered in green, blue, or red in the appropriate cells.
CTRL + z CTRL + y Erase elements that belongs to the selected mode Erase problem or solution grid

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Mode: Shape