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: Luis, Quezon City, Philippines
I've undertaken my own programming project to create a sudoku solver ever since I was exposed to it this year. I recently came across your site and it's been a great resource. I have a question with regards to naked pairs/triples/quads. There is no mention of naked quid(?)s (group of 5s) and above. Does this mean that this strategy isn't valid or that there are no instances where this setup will happen? I admit I'm not much of a sudoku solver so I had to ask. Thanks for your time.
... by: Leon Heckman, United States Boston MALoad Sudoku: CLICK TO LOAD
Lately, I have become interested in Sudoku because it is printed in the local paper and I try to solve the puzzles on my train ride to work. I can solve many of the puzzles but I get stumped on many as well. So, I found your excellent website to improve my skills. I also bought your book and I am wait for its arrival.
Now my question:
I found a website that generates Sudoku puzzles that can be printed. I selected a moderate puzzle since I am trying to learn the process. I printed from this site.
After working on a solution for many hours, I gave up and entered the puzzle into your application. Your application cannot find a solution either.
I don't understand. Maybe you can help me.
You are the victim of an unscupulous sudoku web site. Use the link in this posting to reload the so called moderate 17 from that web site. Press the "Solution Count" button. You will see it has 51 solutions. These people don't know how to make sudoku puzzles. Logical strategies only work if there is only one solution.
yourfungames.com is probably just an advertising revenue web site. Certainly looks crowded with ads. Yuck. If you want some real puzzles go to www.sudoku.org.uk
... by: PaulWay, Canberra, AustraliaLoad Sudoku: CLICK TO LOAD
I assume you're using AJAX to send the problem to a server which can perform the more detailed analysis and send back the next step. Maybe there's some timeout there, or the process got killed because it took too long?
What I'd dearly love to know is how the M-Sudoku app came up with such a fiendish puzzle!
... by: vidya, indonesiaLoad Sudoku: CLICK TO LOAD
... by: David Woodard, UK
Just one little question: At present the solver highlights the numbers which can be eliminated. Would it be possible to highlight also (in a different colour!) the pair or whatever it is that allows the elimination?
... by: Judy M., Alaska
... by: Carmen Martinez, SpainLoad Sudoku: CLICK TO LOAD
Thank you very much for all I´ve learned with you ,and excuse my english for I am spanish.
Most likely, you omitted one or more of the givens when you entered this sudoku into the solver.
... by: Ron M, Australia
Regards. Ron M
... by: Chuck Bruno, Virginia
For the various stratagies listed on the right side, in addition to being able to turn them off by removing the check mark, how about being able to re-order them by changing the number of the stratigy, perhaps by putting another box for the number just to the right of the checkmark box. What do you think?
Thanks again for this extreemly useful program.
... by: CES, USALoad Sudoku: CLICK TO LOAD