Feedback and Questions
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 andrew@str8ts.com.
Post a Comment or Question here...
Sunday 31-Dec-2006
... by: steve brod, utah
Thanks for the help.
I do have a solver for 16x16 which I wrote last year - its not got all the strategies that the 9x9 have since I stopped working on it. It will give you the opening candidates if you press Take Step once. But I've just checked it again and it doesn't have a print feature. The main board doesn't really paste well into Excel either.
It shouldn't be a big task to create an excel spreadsheet with that ability.
I'll add it to the job queue, it should have been released a while ago ;-)
Saturday 30-Dec-2006
... by: Philipp, Germany
Load Sudoku: CLICK TO LOADIs it impossible to solve it by logic steps?
Thursday 28-Dec-2006
... by: Sue Ogden, United States
http://www.scanraid.com/sudoku.htm - this pretty much does what you describe. The jigsaw solver is based on the orginal normal sudoku one
Friday 22-Dec-2006
... by: Richard Proctor, US
I'm trying to get my mind around both of the "Y Wing" strategies. I've tried to understand all of your examples but I cannot seem to understand the relationships. I've seen some ot these in some of the puzzles that I've done recently. And after I felt that I knew what the possibility was I checked the answer sheet and I was right, but I don't understand why. I just see the possibility.
Can you help me better understand this strategy?
Richard
Friday 22-Dec-2006
... by: Richard Proctor, US
Richard Proctor
Wednesday 20-Dec-2006
... by: Steve Powers, United States
Your Jigsaw solver is a nice tool. However, I would like to suggest that you consider changing the order of the basic tools from:
1: Singles in Row/Col
2: Singles in Box
3: Naked Pairs/Triples
4: Hidden Pairs/Triples
5: Naked Quads
6: Pointing Pairs
7: Box/Line Reduction
to
1: Singles in Row/Col
2: Singles in Box
3: Naked Pairs/Triples
4: Pointing Pairs
5: Box/Line Reduction
6: Naked Quads
7: Hidden Pairs/Triples
The order of revised order of 1-5 are pretty arbitrary, but I suspect that these 5 steps are used by most players to find eliminations before they ever start looking for Naked Quads or hidden pairs or triples. Without aid, I have successfully used ALL of the first 6 steps on a regular basis. Perhaps, I have RARELY found a hidden pair. I don't think that I've EVER found a hidden triple - without someone (or a program) pointing it out to me.
Saturday 16-Dec-2006
... by: Sim, Hong Kong
Thursday 14-Dec-2006
... by: Karsten Nyblad, Denmark
Load Sudoku: CLICK TO LOADThe attached sudoku has this properry.
The solver should report an error, if all candidates are deleted from a cell.
Wednesday 13-Dec-2006
... by: ken, New Jersey
Sunday 10-Dec-2006
... by: DoloresB, Chicago
Anyone else having a similar problem?