dailysudoku.com Forum Index dailysudoku.com
Discussion of Daily Sudoku puzzles
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Vanhegan extreme Nov. 17
Goto page 1, 2  Next
 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles
View previous topic :: View next topic  
Author Message
nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
PostPosted: Tue Nov 18, 2008 7:37 pm    Post subject: Vanhegan extreme Nov. 17 Reply with quote
Code:

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

one UR (79, with strong links on 7) in the lower left. Then?


play online
Back to top
View user's profile Send private message Send e-mail Visit poster's website
storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Tue Nov 18, 2008 8:04 pm    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
|G589    2      3     | 59     7      4     | 158    1569   15689 |
| 4     R59     1     | 8      2      6     | 3      59     7     |
|G589    7      6     | 359    39     1     | 4      2      589   |
:---------------------+---------------------+---------------------:
| 269    4      7     | 169    5      89    | 128    3      1268  |
| 3     -5689   589   | 7      189    2     |G158   G156    4     |
| 256    1      58    | 36     4      38    | 9      7     R2568  |
:---------------------+---------------------+---------------------:
|R1579   3      4     | 2      19     79    | 6      8     G159   |
| 169    689    2     | 4      1389   5     | 7      19     139   |
|R157   G589   G589   | 139    6      3789  |R125    4     R12359 |
'---------------------'---------------------'---------------------'

umm, this dizzying coloring move on 5's
(5)r2c2 = (5)r13c1 - (5)r79c1 = (5)r9c23 - (5)r9c79 = (5)r7c9 - (5)r6c9 = (5)r5c78; r5c2 <>5

Last edited by storm_norm on Tue Nov 18, 2008 8:33 pm; edited 1 time in total
Back to top
View user's profile Send private message
nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
PostPosted: Tue Nov 18, 2008 8:06 pm    Post subject: Reply with quote
Norm, I guess by "strange "hinge/grouped" coloring move on 5" you mean this:


I would not have found this one without your hint. Ugh!
Back to top
View user's profile Send private message Send e-mail Visit poster's website
nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
PostPosted: Tue Nov 18, 2008 8:08 pm    Post subject: Reply with quote
Ah, I see!
Not quite but close enough.

Still I see no way from here Sad
Back to top
View user's profile Send private message Send e-mail Visit poster's website
storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Tue Nov 18, 2008 8:17 pm    Post subject: Reply with quote
actually yours is better
Back to top
View user's profile Send private message
nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
PostPosted: Tue Nov 18, 2008 8:20 pm    Post subject: Reply with quote
Just a shortcut to the same effect.

Still I see no way from here Sad

I should have added:
the 79 UR I mentiooned, works like this:

if r9c1=9 then both (SL 7 in col 1) r7c1=7 and (SL 7 row 9) r9c6=7 which is the DP thus r9c1<>9

I guess this one is for the computers or maybe a very clever Medusa approach. I give up...
Back to top
View user's profile Send private message Send e-mail Visit poster's website
storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Tue Nov 18, 2008 8:41 pm    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
|*589    2      3     | 59     7      4     | 158    1569   15689 |
| 4     #59     1     | 8      2      6     | 3    #59     7     |
|*589    7      6     | 359    39     1     | 4      2      589   |
:---------------------+---------------------+---------------------:
| 269    4      7     | 169    5      89    | 128    3      1268  |
| 3      689    589   | 7      189    2     | 158    156    4     |
| 256    1      58    | 36     4      38    | 9      7      2568  |
:---------------------+---------------------+---------------------:
|*1579   3      4     | 2      19     79    | 6      8    *-159   |
| 169    689    2     | 4      1389   5     | 7     #19     139   |
| 157    589    589   | 139    6      3789  | 125    4      12359 |
'---------------------'---------------------'---------------------'

using the same groups
(1=9)r8c8 - (9)r2c8 = (9-5)r2c2 = (5)r13c1 - (5)r7c1 = (5)r7c9; r9c7 <> 1
this provides a strong link on 1 in row 7.
and a bi-value cell in r7c9.
don't give up !! Rolling Eyes
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Nov 18, 2008 11:12 pm    Post subject: Reply with quote
The coloring elimination:

Code:
 finned Franken Swordfish c378\r59b3  =>  [r5c2]<>5
Back to top
View user's profile Send private message
re'born



Joined: 28 Oct 2007
Posts: 80
PostPosted: Tue Nov 18, 2008 11:43 pm    Post subject: Reply with quote
[Edit: Post deleted because I couldn't copy the puzzle down correctly.]

Last edited by re'born on Wed Nov 19, 2008 3:01 am; edited 1 time in total
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Wed Nov 19, 2008 12:21 am    Post subject: Reply with quote
SSTS?? meaning??
Back to top
View user's profile Send private message
Kdelle



Joined: 20 Mar 2008
Posts: 59
Location: Hudson, NH
PostPosted: Wed Nov 19, 2008 12:29 am    Post subject: Reply with quote
I don't see the strong link connecting the 59s. What am I missing?
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Nov 19, 2008 12:38 am    Post subject: Reply with quote
Kdelle wrote:
I don't see the strong link connecting the 59s. What am I missing?

I'm missing it as well. I get the two cells as being complementary.

storm_norm wrote:
SSTS?? meaning??

Simple Sudoku Technique Set:

Code:
Naked/Hidden Single/Pair/Triple/Quad
Locked Candidate 1 & 2
X-Wing, Swordfish
XY-Wing
Colors, Multi-Colors

===== ===== ===== =====

I think there is a (589) DP in [band 1] that results in [r1c9]<>5, but it doesn't seem to be of any help.

There is also a short chain that leads to [r4c4]<>9, followed by a Kite for [r9c6]<>9, but everything locks up again.
Back to top
View user's profile Send private message
re'born



Joined: 28 Oct 2007
Posts: 80
PostPosted: Wed Nov 19, 2008 3:02 am    Post subject: Reply with quote
Uh, yeah. Sorry everyone. I didn't copy things down correctly and I'll go slink away now.
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Wed Nov 19, 2008 3:06 am    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
| 589    2      3     | 59     7      4     | 158    1569   15689 |
| 4      59     1     | 8      2      6     | 3      59     7     |
| 589    7      6     | 359    39     1     | 4      2      589   |
:---------------------+---------------------+---------------------:
| 269    4      7     | 169    5      89    | 128    3      1268  |
| 3      689    589   | 7      189    2     | 158    156    4     |
| 256    1      58    | 36     4      38    | 9      7      2568  |
:---------------------+---------------------+---------------------:
| 1579   3      4     | 2      19     79    | 6      8      59    |
| 169    689    2     | 4      1389   5     | 7      19     139   |
| 157    589    589   | 139    6      3789  | 125    4      12359 |
'---------------------'---------------------'---------------------'

so just to make things clear, this is where we are.
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Wed Nov 19, 2008 4:31 am    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
| 589    2      3     |#59     7      4     | 158    1569   15689 |
| 4      59     1     | 8      2      6     | 3      59     7     |
| 589    7      6     |#359   *39     1     | 4      2      589   |
:---------------------+---------------------+---------------------:
| 269    4      7     |16-9    5     *89    | 128    3      1268  |
| 3      689    589   | 7     *189    2     | 158    156    4     |
| 256    1      58    | 36     4      38    | 9      7      2568  |
:---------------------+---------------------+---------------------:
| 1579   3      4     | 2      19     79    | 6      8      59    |
| 169    689    2     | 4     *1389   5     | 7      19     139   |
| 157    589    589   | 139    6      3789  | 125    4      12359 |
'---------------------'---------------------'---------------------'

(9=8)r4c6 - (8)r5c5 = (8-3)r7c5 = (3-9)r3c5 = (9)r13c4; r4c4 <>9

now there is a strong link on 9 in row 4, this is the remaining grid: after Danny's kite.
Code:
.---------------------.---------------------.---------------------.
| 589    2      3     | 59     7      4     | 158    1569   15689 |
| 4      59     1     | 8      2      6     | 3      59     7     |
| 589    7      6     | 359    39     1     | 4      2      589   |
:---------------------+---------------------+---------------------:
| 269    4      7     | 16     5      89    | 128    3      1268  |
| 3      689    589   | 7      189    2     | 158    156    4     |
| 256    1      58    | 36     4      38    | 9      7      2568  |
:---------------------+---------------------+---------------------:
| 1579   3      4     | 2      19     79    | 6      8      59    |
| 169    689    2     | 4      1389   5     | 7      19     139   |
| 157    589    589   | 139    6      378   | 125    4      12359 |
'---------------------'---------------------'---------------------'
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Nov 19, 2008 10:49 am    Post subject: Reply with quote
From Norm's final PM, two more eliminations.

Code:
 [a]<>7 [b]=7 [c]=9 [d]<>9 [e]=9 [f]<>9 [g]=9 [h]=5  =>  [a]<>5
 +-----------------------------------------------------------------------+
 | f589    2      3      |  59     7      4      |  158    1569   15689  |
 |  4     g59     1      |  8      2      6      |  3      59     7      |
 | f589    7      6      |  359    39     1      |  4      2      589    |
 |-----------------------+-----------------------+-----------------------|
 | e269    4      7      |  16     5     d89     |  128    3      1268   |
 |  3      689    589    |  7      189    2      |  158    156    4      |
 |  256    1      58     |  36     4      38     |  9      7      2568   |
 |-----------------------+-----------------------+-----------------------|
 | b1579   3      4      |  2      19    c79     |  6      8      59     |
 |  169    689    2      |  4      1389   5      |  7      19     139    |
 | a157   h589    589    |  139    6      378    |  125    4      12359  |
 +-----------------------------------------------------------------------+

Code:
                             [r7c9]=9
          /                           \
 [r7c1]=5  [r9c1]=7 [r8c1]=1 [r8c8]=9  contradiction!  =>  [r7c1]<>5
 +-----------------------------------------------------------------------+
 |  589    2      3      |  59     7      4      |  158    1569   15689  |
 |  4      59     1      |  8      2      6      |  3      59     7      |
 |  589    7      6      |  359    39     1      |  4      2      589    |
 |-----------------------+-----------------------+-----------------------|
 |  269    4      7      |  16     5      89     |  128    3      1268   |
 |  3      689    589    |  7      189    2      |  158    156    4      |
 |  256    1      58     |  36     4      38     |  9      7      2568   |
 |-----------------------+-----------------------+-----------------------|
 |  1579   3      4      |  2      19     79     |  6      8      59     |
 |  169    689    2      |  4      1389   5      |  7      19     139    |
 |  157    589    589    |  139    6      378    |  125    4      12359  |
 +-----------------------------------------------------------------------+

Leaving:

Code:
 +--------------------------------------------------------------+
 |  589   2     3     |  59    7     4     |  158   1569  1689  |
 |  4     59    1     |  8     2     6     |  3     59    7     |
 |  589   7     6     |  359   39    1     |  4     2     89    |
 |--------------------+--------------------+--------------------|
 |  269   4     7     |  16    5     89    |  128   3     1268  |
 |  3     689   89    |  7     189   2     |  158   156   4     |
 |  256   1     58    |  36    4     38    |  9     7     268   |
 |--------------------+--------------------+--------------------|
 |  179   3     4     |  2     19    79    |  6     8     5     |
 |  169   689   2     |  4     1389  5     |  7     19    139   |
 |  17    589   589   |  139   6     378   |  12    4     1239  |
 +--------------------------------------------------------------+
 # 71 eliminations remain
Back to top
View user's profile Send private message
Steve R



Joined: 24 Oct 2005
Posts: 289
Location: Birmingham, England
PostPosted: Wed Nov 19, 2008 12:55 pm    Post subject: Reply with quote
r3c5 = 9 => r3c59 = (89) => r3c1 =5 => r6c3 = 5 => r5c23 contain 8 => r57c5 = (19) => r3c5 ≠ 9.

Steve R
Back to top
View user's profile Send private message
re'born



Joined: 28 Oct 2007
Posts: 80
PostPosted: Wed Nov 19, 2008 2:24 pm    Post subject: Reply with quote
From Steve's deduction, we are left with (after a single and a naked pair)
Code:

 *-----------------------------------------------------------*
 | 589   2     3     | 59    7     4     | 158   1569  1689  |
 | 4     59    1     | 8     2     6     | 3     59    7     |
 | 589   7     6     | 59    3     1     | 4     2     89    |
 |-------------------+-------------------+-------------------|
 | 269   4     7     | 16    5     89    | 128   3     1268  |
 | 3     689   89    | 7     189   2     | 158   156   4     |
 | 256   1     58    | 36    4     38    | 9     7     268   |
 |-------------------+-------------------+-------------------|
 | 179   3     4     | 2     19    79    | 6     8     5     |
 | 169   689   2     | 4     189   5     | 7     19    3     |
 | 17    589   589   | 13    6     378   | 12    4     129   |
 *-----------------------------------------------------------*

An empty rectangle in box 9 kills the 9 in r9c2. A transported xyz-wing with pivot r9c3 then eliminates 8 from r5c5. This cracks the puzzle.
Back to top
View user's profile Send private message
cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada
PostPosted: Wed Nov 19, 2008 5:12 pm    Post subject: Reply with quote
After basics I just went to the centre cell and made it a <1>. All singles after that. Well I finished it didn't I !! Evil or Very Mad
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Nov 19, 2008 6:26 pm    Post subject: Reply with quote
Quote:
An empty rectangle in box 9 kills the 9 in r9c2. A transported xyz-wing with pivot r9c3 then eliminates 8 from r5c5. This cracks the puzzle.


I can't see a transport.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles All times are GMT
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group