SudokuSolver Forum

Do any of you know anything about this site? I'm wondering about the sudoku puzzles (they have other puzzles, as well) and who creates them. Even the "expert" level seems to rate only about 350-450 on Ruud's Sudocue scale, and I've run across at least one puzzle with more than one solution. It also seems to be impossible to select a specific puzzle, and almost none of them are symetrical in any way. There is no contact information anywhere on the site (that I've found), nor anything about who runs it.

You'll get domain infos using whois. If you don't have a whois tool on your computer, here is as website that does the same:
http://whois.domaintools.com/mypuzzle.org

Here is an URL to get puzzle data from this site. You may change the level from 1 (easy) to 4 (expert)
http://mypuzzle.org/sudoku/new_sudoku.php?level=4
It seems to return a different puzzle at each request.

Hope this helps

_________________
Jean-Christophe
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes.

Thanks, Jean-Christophe! Unfortunately, that doesn't seem to provide much info, nor does the wiki article in the whois link.

Hi Enxio27,

probably I can help here. Basically a friend of mine and me setted up http://mypuzzle.org a few month ago.
Our focus until now was to concentrate on content (in terms of puzzle games). We are preparing a blog but its not online yet.

Regarding the sudoku puzzles, especially the standard under http://mypuzzle.org/sudoku/play.html...
We used the minimal sudoku collection of Gordon Royle from http://people.csse.uwa.edu.au/gordon/sudokumin.php that are unique
solution sudokus with 17 hints and saved 20.000 into our database. So when you start a new standard sudoku it will load one randomly, solve it and adjust the number of empty cells accordingly to the level of difficulty. There has been a bug regarding the following uniqueness which should be fixed meanwhile. If there are still multi-solutions from now I would be glad when you give me a hint.

I hope that makes sense how it works now?! We are still evaluating what makes sense to the puzzle community for all games.
So when you have feedback for us in terms of missing must/nice to have functionality we would be glad to know! Just drop me an email until the blog is up and running to tom add mypuzzle.org.

Thanks, Tom

So all of your puzzles are from that collection? Let me make sure I understand this: you take a random puzzle from the Royle 17-clue collection, solve it, and then create a new puzzle from the solved grid? And the puzzle difficulty is controlled strictly by the number of clues left in the puzzle? Is that correct?

What exactly comes up when one accesses the URL mentioned by Jean-Christophe:


All the puzzles generated from that URL seem to have a Sudocue difficulty score in the range of 270-290 (Easy), regardless of the level selected.


Here's one I just got when selecting a puzzle of "expert" difficulty from the http://mypuzzle.org/sudoku/play.html page:

018070000000004006000000091604050003000120005800000020400300000100840200000000170

SadMan Sudoku says it has two solutions.


Some features that I would like to see: printing the puzzle, saving the puzzle to file (above format would be fine), and being able to select a specific puzzle (by puzzle ID/number). Personally, I prefer some symmetry in the puzzle, but that's strictly aesthetics, and apparently a large number of other people don't care.

Also, you might need to rethink your difficulty ratings. Here is another "expert" puzzle I got from the http://mypuzzle.org/sudoku/play.html page:

000620508401000000000000200600017940050090030000000000300000079080570000000300600

However, the Sudocue difficulty score for this one is 396, still in the "Easy" range.

Thanks for your help!

That is correct by now. We just assure that the same 17 hints are in the puzzle. That is of course not the real truth in terms of difficulty and might be changed to solving related rating.


That will create default-level 2 because I'm using POST variables not GET.


See above...always level 2.


Thanks, I will try to check that!


printing is on our agenda, saving might be an idea. Selecting a specific puzzle or/and dailys is of course a good thing and should be seen soon.
I need to think about offering symmetry in our sudokus.


As mentioned on top...definately an issue.

Thanks for that great feedback! I will update you on enhancements

Tom

Hi Enxio,

meanwhile we did some changes to our Standard Sudoku. Basically it has been our intention to provide our own puzzles and now I updated our solver with some advanced techniques to generate more difficult one.
Also we now offer a new fixed sudoku per level and day. Except the very hard, because I want some feedback before that they will be solved.
However by now you should see the puzzles for the last days. Next thing is to provide a search form to browse all puzzles in our database or look for specific (level and used solving technique). Also a basic printing function should arrive soon.

Please dont use the new_sudoku.php, its the old functionality with old puzzles.
Here maybe some examples for new generated puzzles:

level1: 030570208070004000009068370002400007400350000690702003000000000803000024704005031
level2: 365210000100000300009000002200006070800000103007100005500043690706000004040675031
level3: 100006004400000300000080501300092000600000900007000005000800070902000040006903800
level4: 040502000100000200009070000000090048600805090000000003030000075900000030800040012
level5: 207106089108000400060000002502040008600000200000002014000930000900004000076210905
level6: 000470008108093400000020003003600005500000900607000001001002000900008507860000020

I would be happy to get some feedback.

thanks, Thomas

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http://mypuzzle.org

Interesting! Thanks! I ran these through Sudocue's rating function. Here are the results:

000001=R=49;B=0;S=310;I=48;FH=19;D1=7;M1=19;B1=3;R1=1
000002=R=49;B=0;S=306;I=48;FH=20;D1=6;M1=20;B1=2;R1=1
000003=R=61;B=0;S=724;I=21;FH=20;D1=7;M1=21;B1=3;R1=1;C1=2;N1=3;LP=2;N2=2
000004=R=63;B=0;S=989;I=12;FH=20;D1=7;M1=20;B1=4;R1=2;C1=2;US=1;N1=1;LP=2;L1=1;L2=1;N2=1;N3=1
000005=R=62;B=0;S=1605;I=20;FH=21;D1=6;M1=19;R1=3;C1=1;N1=1;L1=5;N2=2;SK=1;2S=2;Y2=1
000006=R=69;B=0;S=2023;I=2;FH=20;D1=6;M1=20;B1=2;R1=1;C1=1;N1=4;LP=3;L1=4;L2=2;N2=2;N3=1;N4=1;X2=1;Y2=1

The explanation for these values is here, in the last section on the page. Note the values for S, which is the difficulty score. Definitely a wider range for these than what you had before. The puzzles for levels 1 and 2 have nearly identical scores, and the same total number of steps required (the sum of the numbers which follow the score).

I'll post more after I work on them. I think the last two are beyond my skill level at the moment (I haven't gotten beyond X-Wings yet).

Hi Enxio, all,

after the great feedback I were busy some time adding new features to our site.
We added print functionality, export, auto-check, pencilmarks and even symmetric puzzles today for Enxio
Of course again for each difficulty.
Also we added the diabolic level. I know thats not for everyone, but a colleague (sudoku crack) just solved two of them.

So again I really appreciate your feedback concerning bugs, additional features and so on.

Many thanks

Tom

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http://mypuzzle.org/sudoku/play.html