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Fill the grid with digits 1 to 9, where in each row, every column and in each of the nine 3x3 boxes each digit occurs exactly once. The numbers in cells with an arrow occur in direction of the arrow exactly once.

Today's picture shows a pyramid with a manger scene. Joseph has a Christmas Matins lantern in his hands. Lanterns of this type are used in the Erzgebirge on the way to Christma Matins on the morning of the 25th December.

The Erzgebirgian people celebrate Christmas Eve with a feast, the Neinerlaa (literally: nine different things). There are many rules surrounding the Neinerlaa. It would take too long to mention them all here. But the nine ingredients that gave the Neinerlaa the name have special meanings. The Griene Kließ (raw potato dumplings) will bring money, the lentils or the millet little money, the beetroot red cheeks (i.e. health), the root celery fertility, bread roll milk white clothes (i.e. order in the house). Also important, there must be animals on earth (sausage from the pig), in the air (goose) and in the water (now herring, formerly also carp).

When I decided to make a Neinerlaa puzzle, it quickly became clear there should be a sudoku, because there are nine rows, nine columns, nine boxes and nine numbers. The pioneering role of the components are symbolized in our puzzle by nine kinds of arrows. And to top this, there is sometimes a purple cell border if the sum of the neighboring cells is 9.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 3. Each row, column, and 3x3 box contains each digit three times. The red arrows indicate that the digit in that cell can't appear in the direction of the arrow.

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 will have exactly one of each digit. The clues along the edges tell you how many skyscrapers you can see from that vantage point.

In each 3x3 box their is a different rule to follow:

• Upper left - Even/Odd Sudoku: Yellow cells must contain odd digits, green cells must contain even digits.
• Upper centre - Min Max Quad Sudoku: The red points in the near of crosses where four cells meet each other show that the cell with the red points is greater then the three other ones. The blue rings in the near of crosses where four cells meet each other show that the cell with the blue ring is smaller then the three other ones.
• Upper right - Arrow Sudoku: The digit in the circle is the sum of the digits which are marked with its arrow.
• Centre left - Difference Sudoku: The numbers between two cells give the difference of the digits.
• Centre - Navigator Sudoku: The arrows show the location of the same number in the previous or next column or row. So for example, the arrow in fifth column means that the same digit is in the sixth column in row 6 - 9.
• Centre right - Greater/Less Sudoku: The inequality between each pair of digits must stand correct.
  

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The arrows show where the successor of the digit in the cell is (within the box). The digit 9 has an arrow in direction to number 1.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The arrows show the location of the same number in the previous or next column or row. So for example, the arrow next to the 9 in the first column means that the 9 in the second column is in row 1 - 4.

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 will have exactly one of each digit. The clues along the edges tell you how many skyscrapers you can see from that vantage point. The arrows show the location of the same number in the previous or next column or row. So for example, the arrow next to the 2 in the first column means that the 2 in the second column is in row 6 - 9.
There is only one solution. You can find it by logic.