Welcome to the favorite meeting place for true Sudoku addicts. Here you can find Daily Nightmares, Weekly Assassins, Jigsaw Killers,
Clueless Specials, X-Files, Windokus, loads of Freeware and various solving guides. Discuss your addiction on the forum.
For regular Sudoku, Sudoku-X, Windoku and DG, check out the free SudoCue program.
For irregular Sudoku variations, including Killer Sudoku and Jigsaw Sudoku, use SumoCue.
For the HaniDoku variation, use HaniCue.
Feel free to roam around this site. If you don’t know where to start, take a look at the Most Wanted list.
(Sunday December 19, 2021)
Years ago I started a search for Sudoku-X puzzles with 12 clues. Recently, the total count passed the 10000 mark. But now another search has started, this time for Windoku-X puzzles with 9 clues, early on already surpassing the Sudoku-X search with 13300 unique 9-clue puzzles.
(Saturday December 11, 2021)
The delivery of new Sudokus on this site has been a bit lacking the last 15 years or so, but now even the famous Daily Nightmare has a supply that will last several years. A page with an explanation of the requires codes will be added soon. Advanced solvers, such as the ones who taken on these puzzles, will figure it out soon enough.
(Friday December 10, 2021)
Now starts a new series of daily Clueless Explosion puzzles. You can join the contest, or solve them at your own pace. The new free Clueless Helper can help you with this, and also gives you access to the last 60 Clueless Explosions in the archive.
(Thursday December 9, 2021)
A new Clueless Special will be waiting for you each day, and you can join the contest to see who can solve them the most and the fastest.
The new Clueless Helper can help you with this, and also gives you access to the last 60 Clueless Specials in the archive.
(Thursday December 9, 2021)
I found a way to generate quality Samurai puzzles in large amounts, so the Samurai Contest will have a daily puzzle. A new version of the Clueless Helper will connect to this website to pick up the latest gattai puzzles, including the last Samurai.
(Saturday November 27, 2021)
Enjoy a new daily Hanidoku for the next 10 years, even if I cannot be present to maintain this poor website.
(Saturday November 20, 2021)
Please enjoy a new daily One-Trick Pony for the next decade or so.
(Monday November 15, 2021)
Random generation of Sudoku-X usually produces a lot of extremely difficult puzzles. So I generated a lot and uploaded the ones which required only solving techniques like Naked and Hidden Subsets, Connected Pairs (a.k.a. Crossover), Basic Fish, Remote Pairs, BUG, Skyscraper, 2-String Kite, up to XY-Wing. You can find them for at least 10 years into the future at my X-File page.
(Saturday November 13, 2021)
For the next 20 years, each single day there will be a new Windoku waiting for players on the Windoku page. Each of them requires solving techniques like Naked and Hidden Subsets, Connected Pairs (a.k.a. Crossover), Basic Fish, Remote Pairs, BUG, Skyscraper, 2-String Kite, up to XY-Wing.
This site is now running on an automated stream of daily updates, so there is no purpose in asking for donations any longer. Thank to those who have donated before and kept it alive for as long as it lasted.
Sudopedia was lost around 2012, when it was flooded with spam, and subsequently blocked by my hosting provider due to heavy traffic.
EnjoySudoku has made a good effort to recover as much of it as possible using the Internet Wayback Machine,
and an anonymous person
has revived Sudopedia, also using the Internet Wayback Machine.
I have added a new Sudopedia mirror with most of the pages restored, and completed the missing articles. There are no red links in this mirror.
It will not be possible to change anything as a guest or to create a user profile. However, people who wish to contribute should send me an email with their additions, and I may even create a user profile for them.