Put the numbers 1 through 7 into the hexagonal cells so that every line (of any length) contains every number not more than once. The difference between adjazent cells is never 1.
Put the numbers 1 through 7 into the hexagonal cells so that every line (of any length) contains every number not more than once. The difference between adjazent cells is never 1.
Fill the grid with the digits 1 to 9. The digits represent the height of the skyscraper in each cell. Each row, column and 3x3-box has exactly one of each digit. There are no neighbouring houses with consecutive skyscraper heights. The clues along the edges tell you how many Skyscrapers you can see from that vantage point.
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.