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 firstname.lastname@example.org.
Post a Comment or Question here...
Thank-you everyone for all your questions and contributions.
... by: George, USA
... by: Thom Mitchell, United States
(1) to check my answers for puzzles-without-solutions;
(2) help me improve my solving ability;
(3) nudge me forward when I get stuck with a particular puzzle; and
(4) check Solution Count.
Today I solved a puzzle, checked my solution and found my solution missing in Solver's Solution Count. This suggests an obvious question: Solution Count isn't necessarily exhaustive, correct?
Solution Count is perfectly and 100% exhaustive, I can assure you. For low numbers of clues it can take a long time (and time out since server resources are throttled) and for multiple solution, it will bail at 500 solutions, since more are uninteresting
... by: Karthik Raj, India
I have been using your ios app for quite sometime now. Due to IOS 12 upgrade, I am not able to use it. Can you upload a new version with 64 bit support for people who have purchased it earlier.
UK store link
US store link
If you still have the app on your device, it should automatically update
... by: Michel, Canada
Click on this link:
I am at my wit's (such as it is) end having spent far too much time on this one.
It comes from Stefan Heine Killer Sudoku Hardcore #4.
If you can suggest an approach or another site where I might be able to solicit assistance, I would very much appreciate it. Thank you.
Yes I don’t have enough strategies for very hard Killer, I'm at about 50% at the moment, compared to 1/10,000 normal Sudoku
Sorry It could not be solved, but love to know how it can be solved logically
... by: Doug, USA
Thanks for your great site and for maintaining it over the years!
... by: Ed, USA
Thanks for the great games!!
Since the solver is a "step by step" solver I break down the moves into
- Strategy removes some candidates
- cells with one candidate left are changed into big numbers
- "show possibles" clears of candidates implied by that solved cell
Otherwise stuff would change too much for people to follow
... by: dave, canada
... by: ynotme, France
... by: Kay, USA
... by: Diane, Australia
Thanks for the alert!
Have a great new year