Comparison Sudoku puzzles by KrazyDad
Here are hundreds of free Comparison Sudoku puzzles suitable for printing. These puzzles are also known as Greaterthan Sudoku and Jigoku.
In these three variants, > and < connectors are used between adjacent squares to indicate if the numbers have a greaterthan or lessthan relationship. For example 3 > 2, and 1 < 5.
If you are new to this variant, a good starting strategy is to mark all the squares that might be 9, or that might be 1, and work your way inward. For example, any square that has a > cannot be a 1, and any square that has a < cannot be a 9.
I have previously published a harder version of this puzzle under the name Jigoku. Those puzzles do not have any givens / gimmes, but these ones usually do and they start a bit easier.
Each collection is ordered by difficulty, with the easiest puzzles in Book 1, and the hardest in Book 100. If you are new to these puzzles, I recommend you start with Book 1. If you find they are too easy, skip ahead by 10 books or so. If you find the puzzles are getting too hard, move up to Book #1 of the next volume, and they'll get easier again.
My puzzles are provided in 1perpage format. You can use the formatting option on the download page to produce foldable booklets that conserve paper and ink.

Greaterthan Sudoku Puzzles
> and < are used to indicate that numbers are greaterthan or lessthan.Greaterthan Sudoku, Volume 1
Greaterthan Sudoku, Volume 2

Jiggy Sudoku Puzzles
Greaterthan Sudoku with irregular jigsawstyle regions.Jiggy Sudoku, Volume 1
Jiggy Sudoku, Volume 2

Jones Sudoku Puzzles
Greaterthan sudoku with extra windows so you can keep up with the Joneses.Jones Sudoku, Volume 1
Jones Sudoku, Volume 2
Don't see the format you prefer? Run out of puzzles? Let me know!