9-18-2023

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9-18-2023

Postby SteveG48 » Mon Sep 18, 2023 3:40 pm

Code: Select all
 *-----------*
 |..7|...|.4.|
 |.28|..7|19.|
 |...|59.|...|
 |---+---+---|
 |2.1|6..|...|
 |...|7.9|...|
 |...|..1|7.3|
 |---+---+---|
 |...|.68|...|
 |.42|9..|83.|
 |.9.|...|4..|
 *-----------*
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Re: 9-18-2023

Postby Hajime » Mon Sep 18, 2023 4:28 pm

After Naked (No Hidden) Pairs/Triplets and Quads:
Code: Select all
   +-------------+---------+---------------+ 
   |  9   356  7 |18  18 26|2356   4   256 | 
   | 56    2   8 | 3  4   7|  1    9    56 | 
   | 136  136  4 | 5  9  26| 236  78    78 | 
   +-------------+---------+---------------+ 
   |  2    7   1 | 6  3   4| 59   58   589 | 
   | 356 3568 356| 7 258  9| 26    1    4  | 
   |  4   568  9 |28 258  1|  7   26    3  | 
   +-------------+---------+---------------+ 
   |1357  135  35| 4  6   8| 259  257 12579| 
   | 167   4   2 | 9  17  5|  8    3   167 | 
   |  8    9   56|12 127  3|  4  2567 12567| 
   +---------------------------------------+ 
3 Skyscrapers on digit 6
Code: Select all
Skyscraper (6)r2c1=r2c9-r8c9=r8c1 => (-6)r3c1 (-6)r5c1
Skyscraper (6)r2c9=r2c1-r8c1=r8c9 => (-6)r1c9 (-6)r9c9
Skyscraper (6)r5c3=r9c3-r9c8=r6c8 => (-6)r5c7 (-6)r6c2
stte
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Re: 9-18-2023

Postby Cenoman » Mon Sep 18, 2023 5:12 pm

After LCLS, one skyscraper is enough:
(6): r5c3 = r9c3 - r9c8 = r6c8 => -6 r5c7; ste
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Re: 9-18-2023

Postby Ngisa » Mon Sep 18, 2023 6:25 pm

Code: Select all
+---------------------+-----------------+----------------------+
| 9       356     7   | 18    18     26 | 2356    4      256   |
| 56      2       8   | 3     4      7  | 1       9      56    |
| 136     136     4   | 5     9      26 | 236     78     78    |
+---------------------+-----------------+----------------------+
| 2       7       1   | 6     3      4  | 59      58     589   |
| 356     3568   b356 | 7     258    9  | c26     1      4     |
| 4       568     9   | 28    258    1  | 7      d26     3     |
+---------------------+-----------------+----------------------+
| 1357    135     35  | 4     6      8  | 259     257    12579 |
| 167     4       2   | 9     17     5  | 8       3      167   |
| 8       9      a56  | 12    127    3  | 4       57-6   1567  |
+---------------------+-----------------+----------------------+

(6)r9c3 = r5c3 - r5c7 = (6)r6c8 => - 6r9c8; stte

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Re: 9-18-2023

Postby SteveG48 » Tue Sep 19, 2023 12:18 am

Cenoman wrote:After LCLS, one skyscraper is enough:
(6): r5c3 = r9c3 - r9c8 = r6c8 => -6 r5c7; ste


Yikes. :) I knew this was one of the easier ones, but I try to weed out ones that solve with just plain vanilla skyscrapers and kites.
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