Design a medium-level sudoku puzzle.

Sure , I ' d be happy to help you with a medium - level Sud oku puzzle . Here ' s one for you : \n `` ` \n 5 3 _ | _ 7 _ | _ _ _ \n 6 _ _ | 1 9 5 | _ _ _ \n _ 9 8 | _ _ _ | _ 6 _ \n ------ + ------- + ------- \n 8 _ _ | _ 6 _ | _ _ 3 \n 4 _ _ | 8 _ 3 | _ _ 1 \n 7 _ _ | _ 2 _ | _ _ 6 \n ------ + ------- + ------- \n _ 6 _ | _ _ 2 | _ _ 8 \n _ _ 5 | _ _ 8 | _ _ 7 \n _ _ _ | _ 4 1 | _ _ 5 \n `` ` \n To solve this puzzle , you ' ll need to fill in the missing numbers in each row , column , and 3 x 3 sub grid with the numbers 1 - 9 , making sure that each number is used only once in each row , column , and sub grid . Good luck ! </s>