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 

Puzzle 11/07/11: ~ XY

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj
View previous topic :: View next topic  
Author Message
daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Mon Jul 11, 2011 11:10 pm    Post subject: Puzzle 11/07/11: ~ XY Reply with quote

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

Play this puzzle online at the Daily Sudoku site
Back to top
View user's profile Send private message
tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Thu Jul 14, 2011 2:59 pm    Post subject: Reply with quote

I finally had some time to work on this puzzle and it was a lot of fun; I turned it into a BBDBer! It may be that some of the moves were not useful/required but they were what I found.

anp(67=9)b6q37-(9=7)r9c7-r7c9=r4c9: r45c78<>7
anp(79=6)r96c7-r6c2=r3c2-(6=5=2)r3c98-(2=7)r2c8; r1c7<>7
skyscraper (6) r3c29; r4c3,r6c7<6> r4c6<>7, which is not obviously helpful. However if we transport the fin then: (7)r6c5-r6c7=r4c9; r4c3<>7=8
skyscraper (2)r3c48; r4c5,r5c7<>2
aur(56)r45c67 sis r4c59=6,r5c3=6: aur(56)r45c67[(6)r4c59=(6)r5c3]-r1c3=r1c7-r3c9=r4c9; r4c67<>6
anp(56=7)r5c67-(7=6)r4c5-r4c9=r5c7; r5c3<>6=7

Ted
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Thu Jul 14, 2011 4:42 pm    Post subject: Reply with quote

Although there are additional turbot-type eliminations present, this puzzle does have a reasonable solution.

Code:
 after basics
 +-----------------------------------------------------------------------+
 |  8      5      26     |  267    3      4      |  267    1      9      |
 |  1      3      269    |  5      2679   679    |  4      27     8      |
 |  7      69     4      |  2689   2689   1      |  3      25     56     |
 |-----------------------+-----------------------+-----------------------|
 |  3      4      678    |  1      2679   5679   |  25679  2789   67     |
 |  9      1      678    |  267    4      567    |  2567   278    3      |
 |  2      67     5      |  6789   6789   3      |  679    4      1      |
 |-----------------------+-----------------------+-----------------------|
 |  6      2      3      |  4      79     8      |  1      579    57     |
 |  5      79     79     |  3      1      2      |  8      6      4      |
 |  4      8      1      |  679    5      679    |  79     3      2      |
 +-----------------------------------------------------------------------+
 # 69 eliminations remain

 c29r3   Skyscraper                      <> 6    r4c3,r6c7

 r7c7    2-String Kite                   <> 7    r6c5

M-Wing 5A (6=7)r4c9 - r6c7 = (7-6)r6c2 = (6)r3c2  =>  r3c9<>6   -or-
M-Wing 5B (6=7)r6c2 - r6c7 = (7-6)r4c9 = (6)r3c9  =>  r3c2<>6

Ted, I hope you had fun finding the patterns you posted !

Regards, Danny
Back to top
View user's profile Send private message
dejsmith



Joined: 23 Oct 2005
Posts: 42

PostPosted: Thu Jul 14, 2011 10:08 pm    Post subject: Reply with quote

This has to be a first that I used less steps than Ted! I hope I did not just mess up "correctly".

I had the same 2 first steps as Danny; then
X Wing on 7 in c59; r4c36<>7
XY Chain starting with r5c3, 76-62-26-65-52-29-97; r6c2<>7

Dave
Back to top
View user's profile Send private message
susume



Joined: 13 May 2011
Posts: 36
Location: Southeastern US

PostPosted: Fri Jul 15, 2011 1:38 am    Post subject: Reply with quote

tlanglet wrote:
I turned it into a BBDBer!


What does BBDB mean? I see it on some of Danny's puzzles but not in the Ratings thread.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5162
Location: Rochester, NY, USA

PostPosted: Fri Jul 15, 2011 4:25 am    Post subject: Reply with quote

Quote:
What does BBDB mean?


Bends But Doesn't Break

Looking at the potential 89 DP in boxes 25, either the 26 pseudo cell in r3 or the 67 pseudo cell in r6 kills it. Common outcome; r3c2=9.

W-Wing (79), boxes 89, SL7 in r6; r7c8, r9c46<>9.
Back to top
View user's profile Send private message
ronk



Joined: 07 May 2006
Posts: 397

PostPosted: Fri Jul 15, 2011 12:13 pm    Post subject: Reply with quote

Marty R. wrote:
Looking at the potential 89 DP in boxes 25, either the 26 pseudo cell in r3 or the 67 pseudo cell in r6 kills it. Common outcome; r3c2=9.

Using daj95376's pencilmarks ...
Code:

 after basics
 +-----------------------------------------------------------------------+
 |  8      5      26     |  267    3      4      |  267    1      9      |
 |  1      3      269    |  5      2679   679    |  4      27     8      |
 |  7      69     4      | *89+26 *89+26  1      |  3     *25    *56     |
 |-----------------------+-----------------------+-----------------------|
 |  3      4      678    |  1      2679   5679   |  25679  2789   67     |
 |  9      1      678    |  267    4      567    |  2567   278    3      |
 |  2      67     5      | *89+67 *89+67  3      |  679    4      1      |
 |-----------------------+-----------------------+-----------------------|
 |  6      2      3      |  4      79     8      |  1      579    57     |
 |  5      79     79     |  3      1      2      |  8      6      4      |
 |  4      8      1      |  679    5      679    |  79     3      2      |
 +-----------------------------------------------------------------------+

... I see that pseudo-cell in r2c45 combined with r2c89 forms a quantum naked triple <256> implying r3c2<>6. However, I don't see how the pseudo-cell r6c45 with <67> leads to the same outcome. Please clarify.
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5162
Location: Rochester, NY, USA

PostPosted: Fri Jul 15, 2011 3:38 pm    Post subject: Reply with quote

ronk wrote:
Marty R. wrote:
Looking at the potential 89 DP in boxes 25, either the 26 pseudo cell in r3 or the 67 pseudo cell in r6 kills it. Common outcome; r3c2=9.

Using daj95376's pencilmarks ...
Code:

 after basics
 +-----------------------------------------------------------------------+
 |  8      5      26     |  267    3      4      |  267    1      9      |
 |  1      3      269    |  5      2679   679    |  4      27     8      |
 |  7      69     4      | *89+26 *89+26  1      |  3     *25    *56     |
 |-----------------------+-----------------------+-----------------------|
 |  3      4      678    |  1      2679   5679   |  25679  2789   67     |
 |  9      1      678    |  267    4      567    |  2567   278    3      |
 |  2      67     5      | *89+67 *89+67  3      |  679    4      1      |
 |-----------------------+-----------------------+-----------------------|
 |  6      2      3      |  4      79     8      |  1      579    57     |
 |  5      79     79     |  3      1      2      |  8      6      4      |
 |  4      8      1      |  679    5      679    |  79     3      2      |
 +-----------------------------------------------------------------------+

... I see that pseudo-cell in r2c45 combined with r2c89 forms a quantum naked triple <256> implying r3c2<>6. However, I don't see how the pseudo-cell r6c45 with <67> leads to the same outcome. Please clarify.

With the pseudo pair 67, r6c7=9-->r9c7=7-->r7c9=5-->r3c9=6-->r3c2=9.
Back to top
View user's profile Send private message
ronk



Joined: 07 May 2006
Posts: 397

PostPosted: Fri Jul 15, 2011 5:22 pm    Post subject: Reply with quote

Marty R. wrote:
ronk wrote:
However, I don't see how the pseudo-cell r6c45 with <67> leads to the same outcome. Please clarify.

With the pseudo pair 67, r6c7=9-->r9c7=7-->r7c9=5-->r3c9=6-->r3c2=9.

That's simple enough, but I didn't try for chains quite that long. Thanks.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj All times are GMT
Page 1 of 1

 
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