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 

Super Hard Menneske

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles
View previous topic :: View next topic  
Author Message
keith



Joined: 19 Sep 2005
Posts: 3179
Location: near Detroit, Michigan, USA

PostPosted: Sun Jan 24, 2010 7:22 pm    Post subject: Super Hard Menneske Reply with quote

I enjoyed this one.

Code:
Puzzle: M5307230sh(19)
+-------+-------+-------+
| . 6 . | . 4 . | 3 . 8 |
| . . 2 | . 6 . | . . 7 |
| . . . | 3 . 2 | . 6 . |
+-------+-------+-------+
| . . 8 | 2 . 6 | 7 . . |
| 2 4 . | . . . | . 1 5 |
| . . 7 | 4 . 5 | 8 . . |
+-------+-------+-------+
| 5 . . | 1 . 3 | . . . |
| . . 6 | . 5 . | 2 . . |
| 7 2 . | . 8 . | . 5 . |
+-------+-------+-------+


Keith
Back to top
View user's profile Send private message
arkietech



Joined: 31 Jul 2008
Posts: 1728
Location: Northwest Arkansas USA

PostPosted: Sun Jan 24, 2010 8:49 pm    Post subject: Reply with quote

I like it!
Code:
 *-----------------------------------------------------------*
 | 19    6     159   | 57    4     17    | 3     2     8     |
 | 34    13    2     | 58    6     18    | 1459  49    7     |
 | 8     7     145   | 3     9     2     | 145   6     14    |
 |-------------------+-------------------+-------------------|
 | 19    5     8     | 2     13    6     | 7     349   49    |
 | 2     4     3     | 89    7     89    | 6     1     5     |
 | 6     19    7     | 4     13    5     | 8     39    2     |
 |-------------------+-------------------+-------------------|
 | 5     8     49    | 1     2     3     | 49    7     6     |
 | 34    139   6     | 79    5     479   | 2     8     149   |
 | 7     2     149   | 6     8     49    | 149   5     3     |
 *-----------------------------------------------------------*
(4=3)r2c1-(3=1)r2c2-(1)r8c2=(1)r8c9-(1=4)r3c9
=> r2c78,r3c3<>4
singles
Back to top
View user's profile Send private message
tlanglet



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

PostPosted: Mon Jan 25, 2010 1:13 pm    Post subject: Reply with quote

I had three moves, all on 1.

Flightless xy-wing -149 with vertex in r2c8 and a pincer transport,
skyscraper 1 in r8c29,
another flightless xy-wing -145 with vertex in r3c3 and pincer transport.

+++++++++++

Dan, very nice move.......

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



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Mon Jan 25, 2010 5:16 pm    Post subject: Reply with quote

Code:
 After 3x 2-String Kite {1,4,9}:

 (*) c37r9 Skyscraper in <1> (four  cells)  =>  r1c3=1 or r3c7=1
 (5) r1c3 - r3c3 = r3c7      (three cells)  =>  no cell for <1>
 thus, r1c3<>5
 +-----------------------------------------------------+
 |  9    6   *15a  |  57   4    17   |  3    2    8    |
 |  34   13   2    |  58   6    18   |  59   49   7    |
 |  8    7    45b  |  3    9    2    | *145c 6    14   |
 |-----------------+-----------------+-----------------|
 |  1    5    8    |  2    3    6    |  7    49   49   |
 |  2    4    3    |  89   7    89   |  6    1    5    |
 |  6    9    7    |  4    1    5    |  8    3    2    |
 |-----------------+-----------------+-----------------|
 |  5    8    49   |  1    2    3    |  49   7    6    |
 |  34   13   6    |  79   5    479  |  2    8    149  |
 |  7    2   *149  |  6    8    49   | *149  5    3    |
 +-----------------------------------------------------+
 # 31 eliminations remain

 As a two-digit discontinuous loop:

 (1=5)r1c3 - r3c3 = (5-1)r3c7 = r9c7 - r9c3 = (1)r1c3  =>  r1c3=1
Back to top
View user's profile Send private message
arkietech



Joined: 31 Jul 2008
Posts: 1728
Location: Northwest Arkansas USA

PostPosted: Mon Jan 25, 2010 8:46 pm    Post subject: Reply with quote

daj95376 wrote:
(5) r1c3 - r3c3 = r3c7 (three cells) => no cell for <1>

NICE! Cool
Back to top
View user's profile Send private message
keith



Joined: 19 Sep 2005
Posts: 3179
Location: near Detroit, Michigan, USA

PostPosted: Mon Jan 25, 2010 10:04 pm    Post subject: Reply with quote

Danny,

In your grid there is an XY-wing 59-58-89. Extending the 59 pincer by grouped coloring to R8C9 eliminates 9 in R8C4.

(Which is how I originally solved it.)

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



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Tue Jan 26, 2010 12:53 am    Post subject: Reply with quote

keith wrote:
Danny,

In your grid there is an XY-wing 59-58-89. Extending the 59 pincer by grouped coloring to R8C9 eliminates 9 in R8C4.

(Which is how I originally solved it.)

Hello Keith,

I normally check the puzzles posted in this group, but I try to only post unusual solutions that catch my eye ... or answer questions that may be raised. That way, I'm hoping not to interfere with the well-earned solutions like you and others post.

Regards, Danny

FWIW: There's a <15> gM-Wing present in the first four cells of my chain.
Back to top
View user's profile Send private message
strmckr



Joined: 18 Aug 2009
Posts: 61

PostPosted: Tue Jan 26, 2010 6:17 am    Post subject: Reply with quote

i did singles a box line reduction and naked pair

bringing it to here:
Code:
.--------------.-------------.----------------.
| 19  6    159 | 57  4   17  | 3     2    8   |
| 34@ 13@  2   | 58  6   18  |-1459 -49   7   |
| 8   7   -145 | 3   9   2   | 145   6    14@ |
:--------------+-------------+----------------:
| 19  5    8   | 2   13  6   | 7     349  49  |
| 2   4    3   | 89  7   89  | 6     1    5   |
| 6   19   7   | 4   13  5   | 8     39   2   |
:--------------+-------------+----------------:
| 5   8    49  | 1   2   3   | 49    7    6   |
| 34  139@ 6   | 79  5   479 | 2     8    149@|
| 7   2    149 | 6   8   49  | 149   5    3   |
'--------------'-------------'----------------'



then used a hybrid wing. (better viewed as aic)

AIC 4- r2c1 -3- r2c2 -1- r8c2 =1= r8c9 -1- r3c9 -4 => r2c78,r3c3<>4

and its all singles from here out..
Back to top
View user's profile Send private message
storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Tue Jan 26, 2010 8:52 am    Post subject: Reply with quote

strmckr wrote:
i did singles a box line reduction and naked pair

bringing it to here:
Code:
.--------------.-------------.----------------.
| 19  6    159 | 57  4   17  | 3     2    8   |
| 34@ 13@  2   | 58  6   18  |-1459 -49   7   |
| 8   7   -145 | 3   9   2   | 145   6    14@ |
:--------------+-------------+----------------:
| 19  5    8   | 2   13  6   | 7     349  49  |
| 2   4    3   | 89  7   89  | 6     1    5   |
| 6   19   7   | 4   13  5   | 8     39   2   |
:--------------+-------------+----------------:
| 5   8    49  | 1   2   3   | 49    7    6   |
| 34  139@ 6   | 79  5   479 | 2     8    149@|
| 7   2    149 | 6   8   49  | 149   5    3   |
'--------------'-------------'----------------'



then used a hybrid wing. (better viewed as aic)

AIC 4- r2c1 -3- r2c2 -1- r8c2 =1= r8c9 -1- r3c9 -4 => r2c78,r3c3<>4

and its all singles from here out..


interesting...
I was calling this a mixed w-wing.

strong link on 1's in row 8 join the (14) cell in r3c9 and the (13) cell in r2c2,
much like how a w-wing joins two bi-value cells, except obviously these cells aren't identical. so you would need one more link to provide the pincer 4 in this case.

(4=3)r2c1 - (3=1)r2c2 - (1)r8c2 = (1)r8c9 - (1=4)r3c9

so the part in red would be the "hybrid" w-wing
Back to top
View user's profile Send private message
strmckr



Joined: 18 Aug 2009
Posts: 61

PostPosted: Tue Jan 26, 2010 8:59 am    Post subject: Reply with quote

i was using udosuk's examples of a hybrid wing.
im not 100% sure what to call it if anything.
it kinda fits, but? (...type 6 fits better...)

its a funky move that works pretty good either way Smile
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
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