Jigoku Puzzles

Jigoku (translated as "Hell" in Japanese) is a variation of the popular Sudoku puzzle. Once again, you are given a 9x9 square grid which you must fill with numbers from 1 to 9, so that no number repeats in a row, column or outlined 3x3 square. However, in Jigoku no hint numbers in the grid are shown. Instead you are given the value comparisons (bigger/smaller) of the numbers in the neighboring cells.

The Jigokus below (sorted by difficulty) are shared by KrazyDad, a website with thousands of various types puzzle problems.

Remark: All materials are copyrighted, for personal use only. If you want to use any of them for a book, app, website or periodical, please contact the authors first.