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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:

• Upper left - Consecutive Sudoku: All neighbouring cells with consecutive digits have a colored border.
• Upper centre - Killer <=>: Relation signs represent the relation between the sums of the digits in the sub-regions.
• Upper right - Greater/Less Sudoku: The inequality between each pair of digits must stand correct.
• Centre left - Arrow Sudoku: The digit in a circle is the sum of the digits which are marked with its arrow.
• Centre - Magical square: the sum of any row, any column and both main diagonals in this area is always the same.
• Centre right - Product Sudoku: Digits in a sub-region multiply up to the specified number.
• Lower left - Addoku: Digits in the outside equal the sum of the three numbers of the corresponding row or column in the contigous box.
• Lower centre - Killer: Digits in a sub-region add up to the specified number.
• Lower right - Sum Box Sudoku: First two row of numbers add up to the number formed on the third row.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. Each clue-number is the product of the two neighbored digits.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The specified numbers are equal to the product of there horizontally and vertically adjazent cells. (There is no extra constraint that they must be different.)

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. Some rows and columns have numbers. They represent the product of the two ends.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. Digits in the outside frame equal the product of the three numbers of the corresponding row or column in the contigious box.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The product of the digits within each sub-region is equal to the specified number.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The digit in a oval is either the sum or the product of the digits which are marked with its arrow. The left or top cell in an oval is the tenner, the right or bottom cell is the unit of the sum or product.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. In the green areas the lower row must contain the product of the digits in the upper row.