unit 30
begin
size 9
problem
5 2 7 9 1 8 3 7 4
8 6 3 2 6 1 9 4 9
7 7 9 8 6 2 4 9 2
6 1 9 2 7 5 1 8 8
1 9 6 7 7 4 2 2 8
6 1 1 3 5 5 2 6 6
7 8 1 3 3 8 2 5 9
5 8 4 6 2 2 7 3 1
5 4 7 3 8 2 5 7 6
solution
x - x - - x - - -
- - - - x - - - x
x - x - - x - - -
- x - x - - - - x
- - - - x - x - -
x - x - - x - - x
- x - x - - x - -
- - - - - x - - -
x - - x - - - x -
end
Hitori puzzle 9x9 #1 Medium solve online for free
Other names: Hitori, Reverse Sudoku
Hitori puzzle rules
There is a number in each cell of the field.
Task - to paint (cross out) some cells so that no number is repeated in each row or column (like a sudoku puzzle).
Painted (crossed out) cells can not be next to each other horizontally or vertically, but only diagonally. The remaining cells must be connected to each other horizontally and vertically and form a single group. The crossword puzzle has only one solution.
Cross out several cells according to these specifications:
in each row and each column, the number may appear only once or may be completely highlighted in black. Blackening of the cell can be neither horizontal nor vertical. All loose cells must remain connected. Each number has its own color, which otherwise does not make sense.