Design a medium-level sudoku puzzle.

Here is a medium - level sud oku puzz le for you : \n ``` \n 1 2 3 4 5 6 7 8 9 \n 1 . . . . . . . . . . . . . . . . \n 2 . . . . . . . . . . . . . . . . \n 3 . . . . . . . . . . . . . . . . \n 4 . . . . . . . . . . . . . . . . \n 5 . . . . . . . . . . . . . . . . \n 6 . . . . . . . . . . . . . . . . \n 7 . . . . . . . . . . . . . . . . \n 8 . . . . . . . . . . . . . . . . \n 9 . . . . . . . . . . . . . . . . \n 1 . . . . . . . . . . . . . . . . \n 2 . . . . . . . . . . . . . . . . \n 3 . . . . . . . . . . . . . . . . \n 4 . . . . . . . . . . . . . . . . \n 5 . . . . . . . . . . . . . . . . \n 6 . . . . . . . . . . . . . . . . \n 7 . . . . . . . . . . . . . . . . \n 8 . . . . . . . . . . . . . . . . \n 9 . . . . . . . . . . . . . . . . \n ``` \n To solve this puzz le , you can use the following steps : \n \n 1 . F ill in the known values . In this puzz le , we know that the product of the numbers in the top row must be 1 0 , and the product of the numbers in the left column must be 1 0 . So we can fill in the top left and top right cells with 2 and 5 , respectively . \n 2 . Use the p enc il marks to help you fill in the rest of the puzz le . Start by looking for pairs of numbers that add up to a total of 4 . There are several possible pairs that add up to 4 , so try them out and see which one works best . In this case , we can use the pairs 1 - 3 and 6 - 9 to fill in the rest of the puzz le . \n 3 . Keep trying different pairs of numbers until you have filled in the entire puzz le . You may need to try out several different pairs before you find the correct ones . \n \n I hope this helps ! Let me know if you have any questions or if you would like to see another puzz le . </s>