Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The colored extra-regions must contain each the digits 1 through 9.
In each 3x3 box their is a differet rule to follow:
This combination variant was introduced by Cihan Altay at the 1st Sudoku World Championship.
Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The colored extra-regions must contain each the digits 1 through 9.
In each 3x3 box their is a differet rule to follow:
Fill in the grid so that every ring and every pair of neighboured circle segments contains the digits 1 through 8. There are no neighbouring cells with consecutive digits.
Fill in the grid so that every ring, spoke and 3x3 box contains the digits 1 through 9. There are no neighbouring cells with consecutive digits.
Fill in the grid so that so that both rings contain the digits 1 through 9. There are no neighbouring cells with the same or with consecutive digits.
Fill in the grid so that so that both rings contain the digits 1 through 9. There are no neighbouring cells with the same or with consecutive digits.
Fill in the grid so that it contains the digits 1 through 6 three times each. There are no neighbouring cells with the same or with consecutive digits.
Fill in the grid so that it contains the digits 1 through 6 three times each. There are no neighbouring cells with the same or with consecutive digits.
Fill in the grid so that both lines (the column and the S-form) contain the digits 1 through 9. There are no neighbouring cells with consecutive digits.
Fill in the grid so that both lines (the column and the S-form) contain the digits 1 through 9. There are no neighbouring cells with consecutive digits.