I've received a lot of interesting comments and questions from Sudoku fans over the last few years and this page
is where I try to answer them. I'm also directing Str8ts feedback here. Please feel free to drop me a note on the side of the page. Or you can email me directly at email@example.com.
Post a Comment or Question here...
Thank-you everyone for all your questions and contributions.
... by: Kasmar45, Southern Calif. USA
I am so confused. I am a beginner at solving Sudoku puzzles. The two instructors I have been learning from are The Sudoku Professor and the Sudoku Guy. Both of these people advise against notating all the possible numbers that could go into a cell. Now, I come to your site for some extra pattern solutions and what do I see. All the numbers noted in each cell. ??? So, who is right the people I have been learning from or your method? Both of the people I have been learning from say, if you have more than 3 numbers noted in a cell, then you have too many ?
A confused Sudoku solver.
Note, most of the 'extreme' strategies, while logically correct, involve very complex patterns that really most people are not expected to use on a daily basis. I collect them because in some very special Sudoku puzzles they really are the only way to make process. Sudoku can be very deep.
... by: Peter Carpenter, Monmouth UK
I am a devotee of Killer Sudoku and your superb website. I enter puzzles each week and print them out - one for me and one for a friend. (We're both aged and need the larger size for our copious notes!)
I would love to use the "print in colour" facility but I can't make it work. My printer prints colour fine as a rule but not from your screen which nevertheless displays beautifully tinted on my monitor. Is it me - or is it it ??
With best regards and many heaps of congratulations for being such an enormous help.
You need to tick a box in your print options to "print background colors and images". It varies from browser to browser, some advice here applies:
Very glad you like the puzzles
... by: john d traka, wisconsin
a lot and also in kenKen and Kendoku, eg
(also Rule of 45 for 9x9 puzzles)
... by: Zack, Singapore
Hello. This is a hyper sudoku. I've spent 2 hours and I only found 2. It seems like this site doesn't solve hyper sudoku so I'm here for help.
Hyper sudoku means that there are 4 extra region of 3x3 inside the 9x9. The first 3x3 region starts from the 2nd row 2nd column. The 2nd 3x3 starts from the 2nd row 6th column. The 3rd 3x3 starts from the 6th row 2nd column. And the last 3x3 starts from the 6th row 6th column.
Will post on the site when it's available
And no, the normal solver wont cut it
Edit: Nov 2015 - windoku now released!
... by: Nox, France
Thank you for this free mine of knowledge. This website is absolutely perfect for casual sudoku players who want to learn more about it.
Salutations from France,
... by: Kevin, San Antonio, USA
I am currently developing a Sudoku Solver, and your site has helped me a lot...
... by: Linda, Australia
Let me know is that doesn't solver it
... by: Dave Conway, USA
... by: rec, USA
When I solve a particular cell by removing all but the correct value and then activate "next step" the app does not remove the candidate entries that are no longer valid. This results in my having to manually remove these candidates. This is inconsistent with your solver on the web.
Please correct this.
... by: Keith, Brisbane Aust