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collection 03/29/12

 
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Thu Mar 29, 2012 6:44 am    Post subject: collection 03/29/12 Reply with quote
Code:

 *-----------*
 |...|.2.|...|
 |.5.|...|.9.|
 |..7|3.8|6..|
 |---+---+---|
 |76.|8.2|.49|
 |.34|.1.|86.|
 |...|...|...|
 |---+---+---|
 |1..|...|..5|
 |.7.|...|.8.|
 |98.|5.4|.31|
 *-----------*
 

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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Mar 29, 2012 4:40 pm    Post subject: Reply with quote
I ended up with an invalidity on pencil and paper, so I tried on Draw/Play. Not 100% sure I got all the basics, but it doesn't really matter.

Code:

+-----------------+-------------------+------------------+
| 3468  149 1389  | 14679 2     15679 | 1357  157  3478  |
| 23468 5   1238  | 1467  467   167   | 1237  9    23478 |
| 24    19  7     | 3     59    8     | 6     15   24    |
+-----------------+-------------------+------------------+
| 7     6   15    | 8     35    2     | 135   4    9     |
| 25    3   4     | 79    1     579   | 8     6    27    |
| 258   129 12589 | 467   34567 3567  | 12357 1257 237   |
+-----------------+-------------------+------------------+
| 1     24  236   | 2679  8     3679  | 49    27   5     |
| 2345  7   235   | 129   39    139   | 49    8    6     |
| 9     8   26    | 5     67    4     | 27    3    1     |
+-----------------+-------------------+------------------+

Play this puzzle online at the Daily Sudoku site

M-Wing (24). A 4 in r3c1 proves 4 in r7c2. If r7c2<>2 then r6c2=2; r56c1<>2.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Thu Mar 29, 2012 7:06 pm    Post subject: Reply with quote
Marty R. wrote:
I ended up with an invalidity on pencil and paper, so I tried on Draw/Play. Not 100% sure I got all the basics, but it doesn't really matter.
M-Wing (24). A 4 in r3c1 proves 4 in r7c2. If r7c2<>2 then r6c2=2; r56c1<>2.

Even though we went different routes we wound up at the same place. Very Happy

(2=4)r3c1-r8c1=(4-2)r7c2=(2)r6c2 => r5c1<>2
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Thu Mar 29, 2012 11:54 pm    Post subject: Reply with quote
A variation on the two previous posts is a w-wing(24) with a transported SL(2).

(4=2)r3c1-r5c1=r5c9-r6c8=r7c8-(2=4)r7c2; ric2,r8c1<>4

Ted
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