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Free Press 20 Nov 2015

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sat Nov 21, 2015 9:44 am    Post subject: Free Press 20 Nov 2015 Reply with quote

Code:

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


Keith
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

PostPosted: Sat Nov 21, 2015 11:30 am    Post subject: Reply with quote

R6 -> r9c5=9; stte :
Code:
+------------+--------------------+--------------+
| 4   5   7  | 238  39    29      | 28   6    1  |
| 9   1   3  | 268  5     26      | 248  48   7  |
| 8   6   2  | 7    1     4       | 5    3    9  |
+------------+--------------------+--------------+
| 56  47  19 | 16   2     8       | 47   59   3  |
| 56  47  8  | 9    6(7)  3       | 1    245  24 |
| 2   3   19 | 5    4     (17)    | 78   89   6  |
+------------+--------------------+--------------+
| 7   9   6  | 124  8     5       | 3    124  24 |
| 1   2   5  | 346  367   67      | 9    47   8  |
| 3   8   4  | 12   (79)  27-9(1) | 6    127  5  |
+------------+--------------------+--------------+
Wing[(9=7)r9c5-7r5c5=(7-1)r6c6=1r9c6]-9r9c6=9r9c5; stte
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sat Nov 21, 2015 1:23 pm    Post subject: Reply with quote

Code:
+----------------+----------------+----------------+
| 4    5    7    | 238  39   29   | 28   6    1    |
| 9    1    3    | 268  5    26   | 248  48   7    |
| 8    6    2    | 7    1    4    | 5    3    9    |
+----------------+----------------+----------------+
| 56   47   19   | 16   2    8    | 47   59   3    |
| 56   47b  8    | 9    67c  3    | 1    245  24*  |
| 2    3    19   | 5    4    17d  | 78   89   6    |
+----------------+----------------+----------------+
| 7    9    6    | 124  8    5    | 3    124  24*  |
| 1    2    5    | 346  367  6-7  | 9    47a  8    |
| 3    8    4    | 12   79   1279 | 6    127  5    |
+----------------+----------------+----------------+

ab are pincers (7) of a W-wing. With transport cd it takes out 7 in R8C6.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Nov 21, 2015 6:23 pm    Post subject: Reply with quote

Code:

+----------+--------------+------------+
| 4  5  7  | 238 39  29   | 28  6   1  |
| 9  1  3  | 268 5   26   | 248 48  7  |
| 8  6  2  | 7   1   4    | 5   3   9  |
+----------+--------------+------------+
| 56 47 19 | 16  2   8    | 47  59  3  |
| 56 47 8  | 9   67  3    | 1   245 24 |
| 2  3  19 | 5   4   17   | 78  89  6  |
+----------+--------------+------------+
| 7  9  6  | 124 8   5    | 3   124 24 |
| 1  2  5  | 346 367 67   | 9   47  8  |
| 3  8  4  | 12  79  1279 | 6   127 5  |
+----------+--------------+------------+

Play this puzzle online at the Daily Sudoku site

UR (12)r79c48. Killers yield common outcome

Pseudo cell 47 inr79c8-(4=8)r2c8
4r7c4-r8c4=r8c8-(4=8)r2c8=> 8r2c8
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dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Sat Nov 21, 2015 7:44 pm    Post subject: Reply with quote

I finally found a chain that begins and ends with pincers - just like I recently learned from Marty and Bat. And after reading the following link again, I finally realized that a bivalue cell can be either a strong link or a weak link! I didn't know that! No wonder I couldn't express chains like the following before. I thought it always had to be a strong link! What a great read this is! (Who was the guy named daj...? Is he still around?)

http://www.dailysudoku.com/sudoku/forums/viewtopic.php?t=6708

(I think the following Eureka notation's right? Let me know if it's not.)
(1-7)r6c6=(7-8)r6c7=8r6c8-(8=4)r2c8-(4=7)r8c8=>r8c6<>7.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Nov 21, 2015 9:14 pm    Post subject: Reply with quote

Quote:
(Who was the guy named daj...? Is he still around?)


Danny A. Jones. He's still around but doesn't post here anymore. He used to generate puzzles and post them, but he quit when everyone but me stopped posting solutions.

Quote:
(I think the following Eureka notation's right? Let me know if it's not.)
(1-7)r6c6=(7-8)r6c7=8r6c8-(8=4)r2c8-(4=7)r8c8=>r8c6<>7.


Don, yeah, that works. I think most would notate it with a change in the first term: 7r6c6=(7-8)r6c7
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bat999



Joined: 09 Jul 2015
Posts: 55
Location: UK

PostPosted: Mon Nov 30, 2015 11:16 pm    Post subject: Reply with quote

Code:
.------------.-------------------.--------------.
| 4   5   7  | 238   3-9  b29    | 28   6    1  |
| 9   1   3  | 268   5    b26    | 248  48   7  |
| 8   6   2  | 7     1     4     | 5    3    9  |
:------------+-------------------+--------------:
| 56  47  19 | 16    2     8     | 47   59   3  |
| 56  47  8  | 9     67    3     | 1    245  24 |
| 2   3   19 | 5     4     17    | 78   89   6  |
:------------+-------------------+--------------:
| 7   9   6  | 124   8     5     | 3    124  24 |
| 1   2   5  | 346   367  b67    | 9    47   8  |
| 3   8   4  | 12   a79    127-9 | 6    127  5  |
'------------'-------------------'--------------'
(9=7)r9c5 - (7=9)r128c6 => -9 r1c5,r9c6; stte
Cool
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