Sudoku Programmers

Link to top95

m_b_metcalf — Wed Mar 21, 2012 9:47 am

Author: m_b_metcalf

Posted: Wed Mar 21, 2012 9:47 am

SahuaritaDon wrote:

At one time I found the top95 and saved a bookmark but that did not work and now I cannot find it again. Can some helpful soul please reply with a link that works. Thanx in advance.

Note, however, that they aren't very 'top'. The hardest is rated by Sudoku Explainer at 9.3.

Regards,

Mike Metcalf

2 puzzles with the same solution

m_b_metcalf — Thu Mar 01, 2012 5:07 am

Author: m_b_metcalf

Posted: Thu Mar 01, 2012 5:07 am

PlanetSudoku.com wrote:

Mike,
Not to take this off of topic, but did you use any special methods for removing the redundant pens? I would guess you pulled a pen and tried to solve, if successful pull another, if not pull a different one and repeat?

Not quite, I selected one of the five at random, deleted it, checked for redundant clues again, and repeated until minimal. Other selections are possible.

Regards,

Mike Metcalf

Puzzle collections

PlanetSudoku.com — Thu Mar 01, 2012 3:12 am

Author: PlanetSudoku.com

Posted: Thu Mar 01, 2012 3:12 am

When talking about rating, is there official guidelines to follow when it comes to rating a board?

what is the real easter monster

kartermichael65 — Mon Oct 24, 2011 12:37 pm

Author: kartermichael65

Posted: Mon Oct 24, 2011 12:37 pm

Actually you are asking a question which is not related to this topic...So if you want to know the answer for your question ask it in proper thread.

Searching a collection of hard sudokus

Javus — Tue Oct 11, 2011 10:15 am

Author: Javus

Posted: Tue Oct 11, 2011 10:15 am

Yes, thank you, I tried some and it's exactly what I was searching for.

One Step Puzzles

SudoQ — Sun Sep 25, 2011 5:52 pm

Author: SudoQ

Posted: Sun Sep 25, 2011 5:52 pm

Code:

. . . | . 3 2 | 7 5 .
. . . | 7 . . | . . .
2 . . | . . . | . 3 1
------|-------|------
. 1 8 | 4 . 7 | . 2 .
. . 5 | . . . | 3 7 8
. . . | 6 . . | . . .
------|-------|------
5 . . | . 6 . | . . .
. 8 . | . 1 . | 9 . .
. . 2 | . . . | . 4 .

Code:

. 2 . | . . . | 8 7 .
. . . | . . . | 2 . .
. . 4 | . . . | . . 1
------|-------|------
4 . . | 5 . 6 | 9 3 .
. 7 . | . 3 . | 1 . 4
. . 3 | . . 1 | . . .
------|-------|------
5 . . | 2 . 8 | 3 . .
. . 6 | 7 . . | . . .
. . 7 | . 1 9 | 5 . .

Code:

2 . . | . . . | . . 8
. . 4 | 9 . . | . . .
8 . . | . . . | . 5 .
------|-------|------
. . . | 8 . 2 | . 7 .
. . . | . 7 . | . 1 5
4 . 7 | 6 5 . | 3 . .
------|-------|------
. 8 . | . 9 . | . . 7
. . . | . . . | 8 3 .
. 7 5 | 2 3 8 | 9 . .

Code:

. 3 6 | . . . | . . 9
2 . 7 | . 6 5 | . . .
. 1 . | . . . | 7 . .
------|-------|------
. 7 . | . . . | . . 2
. . . | . . 1 | . . 4
. . . | 9 4 . | 3 5 .
------|-------|------
8 . . | . . . | 1 . .
. 4 . | 5 . . | . . .
9 . . | . 3 2 | . . 5

Code:

. 4 . | . . 2 | . 8 9
. . 3 | . . . | . . 5
2 . 5 | 6 . . | . 1 .
------|-------|------
3 . . | 2 . . | . . 6
9 . 2 | . . . | . . 4
. . . | . . . | 2 . .
------|-------|------
. . . | 9 . 3 | 5 . .
7 3 6 | 5 . 8 | . 9 .
. . . | 7 2 6 | . . .

HTML5 based free Sudoku site

megatron242 — Sun Jul 17, 2011 9:18 pm

Author: megatron242

Posted: Sun Jul 17, 2011 9:18 pm

Hi,

I would like to invite you all to a new Sudoku site:

http://www.livesudoku.net/

As implied in the subject line, the site is using the new Canvas element, introduced in HTML5. Using it is not trivial, so in case someone else also wants to use it, I would gladly give advice on it (believe me, some of the stuff is really non trivial).

The puzzle itself, is random generated using PHP.

Feedback and comments are very welcomed.

Thanks,
vince

Reputed Logically Impossible Sudoku Grid!

Jay — Thu Apr 28, 2011 5:09 pm

Author: Jay

Posted: Thu Apr 28, 2011 5:09 pm

Ah sorry for the re-post in that case!

Cool Gattai Sudoku

Jay — Wed Apr 27, 2011 9:41 pm

Author: Jay

Posted: Wed Apr 27, 2011 9:41 pm

Impressive in the least that this is being solved in pen! -

http://puzzle.gr.jp/kahua/kahua-web/NumberPlace/GattaiImage/NP67gattai-001_BookJacket.jpg

Need 50 easy, 50 medium and 50 hard Puzzles

Jay — Wed Apr 27, 2011 3:39 pm

Author: Jay

Posted: Wed Apr 27, 2011 3:39 pm

Thanks for the Suggestions Pat..

I have since derived a small library of puzzles fitting my requirements..

To answer your Question.. yes i would call those sudoku puzzles listed as hard puzzles, however my Solver is very basic, implementing only a few techniques for solving.

Thanks Again

Jay

a txt File of Easy / Medium puzzles

ronk — Tue Apr 19, 2011 10:38 am

Author: ronk

Posted: Tue Apr 19, 2011 10:38 am

Jay wrote:

the link Ruud has kindly posted appears to no longer be operational,
as such i'm asking if anyone knows a different link to Ruud's benchmarking list

Replacing "www.sudoku.com/forums" with "forum.enjoysudoku.com" will usually work.

http://forum.enjoysudoku.com/viewtopic.php?t=3834

Be aware that many new techniques have been developed since 2006.

One of my hardest grids

patrick84 — Wed Feb 16, 2011 12:47 pm

Author: patrick84

Posted: Wed Feb 16, 2011 12:47 pm

Yep i've to make an effort with optimizations !

But making a good solver for a smartphone it's just amazing because there's no much memory and a very slow processor. Wow..

Tarek's Pearly6000

tarek — Sat Jan 08, 2011 9:31 pm

Author: tarek

Posted: Sat Jan 08, 2011 9:31 pm

The minimum ER is 9.1 & median ER is >10. These puzzles will defeat any puzzle that does not implement extended complex chains.

tarek

1 Cool Sudoku site

tpgames — Thu May 13, 2010 8:15 pm

Author: tpgames

Posted: Thu May 13, 2010 8:15 pm

1)
Sudokugeant This site has harder puzzles! This site has been linked to before in another sub-topic by someone else, but I loved the site so much, that I thought I'd post it here.

EDIT:
edited out other cool site because it is paid only!
I did not mean to post a pay to play site. The free stuff is cool, but they don't change ever. And, the puzzles aren't that difficult.

***

Yes I do have Mike Metcalf's 225x225 Sudoku in HTML, and a 225 pg. PDF (with each 15x15 box on own page) at my site, but I've not made the JS file yet so you can check your answers online. I'll get that done soon! However, I doubt anyone really wants to solve that thing at my site.
I'll give the link anyways - Here .
Thanks goes to Mike, Pat and Don (my dad) who all helped me with this!

17 givens puzzles

Lunatic — Sat Jul 04, 2009 10:20 am

Author: Lunatic

Posted: Sat Jul 04, 2009 10:20 am

It used to be http://people.csse.uwa.edu.au/gordon/sudokumin.php, but inspecting Gordon Royle's main website at http://people.csse.uwa.edu.au/gordon states that it is moved since early july 2009.

Does anyone knows the new link ?