## Can U help solving this puzzle?

Post the puzzle or solving technique that's causing you trouble and someone will help

### Can U help solving this puzzle?

I am not very familure with the various Technics, and don't know where to go from here....

3,1,95, 258,4,7, 28,289,6,
59,24,6, 258,3,258, 1,2489,7,
8,7,24, 6,9,1, 24,5,3,

14,5,148, 48,2,3, 6,7,9,
7,248,3, 9,1,6, 5,248,248,
6,9,248, 7,5,48, 248,3,1,

49,3,489, 1,6,24, 7,248,5,
15,46,7, 245,8,9, 3,16,24,
2,468,15, 3,7,45, 9,16,48,
Kites

Posts: 48
Joined: 20 May 2005

It's a good idea to lay the grid out clearly using the code. This makes it easier for everyone to help you - I have only just learned how to do this so I'm still happy to show off!

Code: Select all
`{3}    {1}    {95}    {258}  {4}    {7}     {28}   {28}    {6}    {59}   {24}   {6}     {258}  {3}    {258}   {1}    {2489}  {7}{8}    {7}    {24}    {6}    {9}    {1}     {24}   {5}     {3} etc`

or if you can't be bothered with that you can just do the single clues

Code: Select all
` 3 1 . | . 4 7 | . . 6 . . 6 | . 3 . | 1 . 7 8 7 . | 6 9 1 | . 5 3 -------+-------+------  . . . | . . . | . . .  . . . | . . . | . . . etc   `

or getting into the budget version!

Code: Select all
`31* *47 **6**6 *3* 1*787* 691 *53etc`

If you're still with me then what you need to look for in your puzzle is an Xwing - find out about those on Simple Sudoku, a free program you can download at http://angusj.com/sudoku/

Yours is an Xwing of 2s in row3 and row6. While you're there look up locked candidates because that's the next thing you'll need. Hope this helps.
emm

Posts: 987
Joined: 02 July 2005

Thank you very much for your tips, Em, they have been a great help. I didn't realise that XWing can be applied to cells with three candidates in them - it all worked out very easily after that.
As for the lay out of my grid, I agree that it didn't look very clear, though I did leave spaces between the columns, but they didn't show for some reason. I'll try and make a better job of it next time...
Thanks again
Kites.

[quote="em"]It's a good idea to lay the grid out clearly using the code. This makes it easier for everyone to help you - I have only just learned how to do this so I'm still happy to show off!

[code]
{3} {1} {95} {258} {4} {7} {28} {28} {6}
{59} {24} {6} {258} {3} {258} {1} {2489} {7}
{8} {7} {24} {6} {9} {1} {24} {5} {3}

etc
[/code]

or if you can't be bothered with that you can just do the single clues

[code]

3 1 . | . 4 7 | . . 6
. . 6 | . 3 . | 1 . 7
8 7 . | 6 9 1 | . 5 3
-------+-------+------
. . . | . . . | . . .
. . . | . . . | . . .
etc

[/code]

or getting into the budget version!

[code]
31* *47 **6
**6 *3* 1*7
87* 691 *53

etc
[/code]

If you're still with me then what you need to look for in your puzzle is an [i]Xwing[/i] - find out about those on Simple Sudoku, a free program you can download at http://angusj.com/sudoku/

Yours is an Xwing of 2s in row3 and row6. While you're there look up [i]locked candidates[/i] because that's the next thing you'll need. Hope this helps.[/quote]
Kites

Posts: 48
Joined: 20 May 2005

31- -47 --6
--6 -3- 1-7
87- 691 -53

-5- -23 679
7-3 916 5--
69- 75- -31

-3- 16- 7-5
--7 -89 3--
2-- 37- 9--

Box 1 contains {24} twice, so
r1c3: {259} >> {59}
r2c1: {459} >> {59}

Box 7 contains no 1 or 5 except in {145} and {1458}
Therefore, r8c1={15} and r9c3={15}

Box 9 contains no 1 or 6 except in {1246} and {1468}
Therefore, r8c8={16} and r9c8={16}

That yields the pencilmarks that were already established.

One can now follow the discussion about the X-Wing that em found.

Mac

P.S. To whoever remembers my "X-Tree", I figured out where that came from. I was a DOS 3.0 user for many years and an invaluable utility before Windows and mouse stuff was XTree. It did a lot of the equivalent of the Windows Explorer. That, SideKick and DOSKEY.COM were all one needed to get past the limitations of DIR and EDLIN.
QBasicMac

Posts: 441
Joined: 13 July 2005

And there I was, with winter on its way for those of us north of the equator, hoping that it might have derived from Xmas-tree. Ho! Ho! Ho!
9X9

Posts: 100
Joined: 26 September 2005

You know, even if you're south of the equator and winter's not on it's way, Christmas is still at the same time.
PaulIQ164

Posts: 533
Joined: 16 July 2005

Code: Select all
` 3 1 . | . 4 7 | . . 6  . . 6 | . 3 . | 1 . 7  8 7 . | 6 9 1 | . 5 3 -------+-------+------ . 5 . | . 2 3 | 6 7 9  7 . 3 | 9 1 6 | 5 . .  6 9 . | 7 5 . | . 3 1 -------+-------+------ . 3 . | 1 6 . | 7 . 5  . . 7 | . 8 9 | 3 . .  2 . . | 3 7 . | 9 . . `

thanks, QBasicMac, for posting the puzzle in a readable way!

and how can i induce you to share your secret with us - namely, your method of transforming the puzzle-with-lists-of-possibilities into the puzzle itself?

please don't tell us that you re-typed the thing!

- Pat

Pat

Posts: 3514
Joined: 18 July 2005

PaulIQ164 - Too right! I lived and worked in Auckland in 1974/5 and spent Xmas at the beach, as all the lillywhite Poms did, just to be able to say I'd done it when I got back to civilization "Upover".
9X9

Posts: 100
Joined: 26 September 2005

[quote="Pat"]...please don't tell us that you re-typed the thing!

- Pat[/quote]

Heh! Well, almost. I copied the stuff into notepad and manually, one-at-a-time changed all multiple-numbers to a single dash. Then I did a global change of all commas to nulls. Then entered the result into my scratch pad, which accepts nearly anything except pencilmarks.

I was curious to follow the discussion, so did all that, but hated to think anyone else would have to do something similar. Glad you were able to benefit

Actually, just entering the numbers wouldn't have been worse than what I did. I "enter all the numbers" every day for the SuDoku of the Day on the internet. It seems to be in picture-format, rather than data I can copy and paste. The only benefit of the NOTEPAD method was that accuracy was assured. The Look-and-copy way results in errors and REALLY tough puzzles at times.

Mac
QBasicMac

Posts: 441
Joined: 13 July 2005

QBasicMac wrote:
Pat wrote:...please don't tell us that you re-typed the thing!

Well, almost. I copied the stuff into notepad and manually, one-at-a-time changed all multiple-numbers to a single dash. Then I did a global change of all commas to nulls. Then entered the result into my scratch pad, which accepts nearly anything except pencilmarks.

I was curious to follow the discussion, so did all that, but hated to think anyone else would have to do something similar.

i've asked elsewhere how to get rid of those lists-of-possibilities (without manually re-typing), but so far no results.

i do suspect that simes has some nifty software to do this, he always manages to clean up (and respond to) the posted puzzles regardless of the mess---

QBasicMac wrote:Actually, just entering the numbers wouldn't have been worse than what I did. I "enter all the numbers" every day for the SuDoku of the Day on the internet. It seems to be in picture-format, rather than data I can copy and paste. The only benefit of the NOTEPAD method was that accuracy was assured. The Look-and-copy way results in errors and REALLY tough puzzles at times.

Mac

for OCR, try Sudoku Susser
( also see http://www.setbb.com/phpbb/viewtopic.php?p=220&mforum=sudoku#220 )

enjoy!

- Pat

.

Pat

Posts: 3514
Joined: 18 July 2005

Thanks for the reference to OCR, Pat. Will look into it.

Just for that, I will write a zap-the-pencilmark program for you.

Mac
QBasicMac

Posts: 441
Joined: 13 July 2005

9X9 wrote:when I got back to civilization

Well really! We're not still in grass skirts down here you know! (indignant outrage)
emm

Posts: 987
Joined: 02 July 2005

Brussels would probably rule out the grass skirts for either being politically incorrect or because you're not in the EU
Zeb

Posts: 5
Joined: 04 October 2005

em - love to see you without the grass skirt - any chance of a pic???
9X9

Posts: 100
Joined: 26 September 2005

Yo, Pat (and anyone else interested)

I promised you a program that could take puzzle descriptions that contain pencilmarks and convert them to descriptions that just show dash for an unsolved cell.