Daily League Sudoku #17: Anti-Knight Sudoku

I didn't have very much inspiration this week to create a Sudoku, so I stepped back to a familiar type. I generally like Anti-Knight Sudokus. This one I constructed with a computer program as backup, to make sure that the there were still valid solutions. This means that when I can't find a valid solution, I check which of the givens I placed led to a situation where there no longer is a valid solution. This saves me from having to backtrack a lot as it can happen that you place multiple givens without being able to see that there is no longer a valid solution. I think the puzzle turned out nice. Enjoy.

Recap of the last Daily League week:

Sunday: Roman Non-Consecutive Sudoku by Seungjae Kwak

Monday: Extra Regions Sudoku by Fred Stalder

Tuesday: Arrow Sudoku by Prasanna Seshadri

Wednesday: Diamond Sudoku by Bastien Vial-Jaime

Thursday: No 3 Skyscraper Sudoku by Jan Zverina

Friday: Nonconsecutive Sudoku by Tom Collyer

Daily League PDF:

Week 18

Rules for Sudoku

In this Sudoku, two cells that are a Knights move away from eachother are always different.

Daily League Sudoku #16: Jigsaw Sudoku

This week no complicated rules but just a Jigsaw Sudoku. I like writing Jigsaw Sudokus. I always try to get the total clue count to 16 or less. I tend to draw out the cage patterns and not all Law of Leftover areas before starting so I can use it when needed. I feel it always helps the design along when you keep good track of that. I don't think the puzzle has anything special, but it's still fun to solve.

Recap of the last week.
Sunday: Clock Faces Sudoku by Seungjae Kwak
Monday: Sequence Sudoku by Fred Stalder
Tuesday: All Even or All Odd Sudoku by Prasanna Seshadri
Wednesday: Diagonal Sudoku by Bastien Vial-Jaime
Thursday: Odd Even Stars Sudoku by Jakub Hrazdira
Friday: Extra Regions Sudoku by Tom Collyer

Daily League PDF's:
Week 16
Week 17

Rules for Sudoku

Daily League Sudoku #15: Difference Sudoku

This week I made a Difference Sudoku. I know I've made a lot of arithmetics-based variants. I think it's just what I'm most comfortable with. Just like I am most comfortable writing Loop genres when making puzzles.
I don't think this puzzle should be too hard. After last week an easier puzzle is probably appreciated. This puzzle has a simple opening and gets a bit harder in the middle, but nothing that should really break up the best solvers. Enjoy.

Recap of the last week:
Sunday: 2-Frame Sudoku by Seungjae Kwak
Monday: Arrow Skyscrapers Sudoku by Fred Stalder
Tuesday: Odd Sudoku with Descriptive Pairs by Prasanna Seshadri
Wednesday: Even Consecutive Sudokube by Bastien Vial-Jaime
Thursday: Odd Even Killer Sudoku by Christoph Seeliger
Friday: Jigsaw Sudoku by Jakub Hrazdira

Rules for Sudoku

In this Sudoku, numbers between two cells indicate the difference between the digits in those 2 cells.

Daily League Sudoku #14: Odd Even Frame Sudoku

Last week I didn't contribute a Sudoku to the Daily League, but this week I'm back. This week features another Frame Sudoku variant. As I'm a fan of most sudokus with sums and I'm pretty good at them, writing these generally comes pretty easy to me. It generally avoids the annoying problem of running out of solutions. I'm pretty sure I've seen this variant before. I'm just not able to remember where I have.
The last few Sudokus had been a bit easier than some of my others. I think this one will again be a bit more challenging, because it has a bit narrower solution path. I think I used the rules pretty well and it stays challenging till the end. I don't want to scare anyone off. I don't think there are any really hard deductions. I just expect slower times than in the previous few weeks. I hope you all enjoy it.

Recap of the last 2 weeks:

Sunday: Coded Sudoku by Seungjae Kwak
Monday: Odd Antiknight Sudoku by Jan Zverina
Tuesday: Anti-Diagonal and Fortress Sudoku by Prasanna Seshadri
Wednesday: Greater Than Sudoku by Bastien Vial-Jaime
Thursday: No Donkey Step Sudoku by Rishi Puri
Friday: Unique Sums Sudoku by Jakub Hrazdira
Saturday: Equal Sudoku by Christoph Seeliger

Sunday: Extra Regions Sudoku by Seungjae Kwak
Monday: Irregular Scattered Sudoku by Fred Stalder
Tuesday: Kropki Sudoku by Prasanna Seshadri
Wednesday: Figures Sudoku by Bastien Vial-Jaime
Thursday: Asterisk Sudoku by Rishi Puri
Friday: Frameless Sudoku by Jakub Hrazdira

Daily League PDF's:
Week 14
Week 15

Rules for Sudoku

In this Sudoku, the numbers on the outside indicate the sum of all odd digits or the sum of all even digits in the first 3 cells seen from that side. It can be that a clue indicates both the sum of all odd digits and the sum of all even digits.