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Vanhegan extreme Nov. 17
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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
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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
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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!
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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
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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
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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...
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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
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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
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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
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Wed Nov 19, 2008 12:21 am    Post subject: Reply with quote

SSTS?? meaning??
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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?
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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.
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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.
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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.
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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 |
'---------------------'---------------------'---------------------'
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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
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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
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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.
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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
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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.
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