April 1, 2019

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April 1, 2019

Postby ArkieTech » Mon Apr 01, 2019 11:14 am

Code: Select all
 *-----------*
 |..9|..8|.2.|
 |.4.|...|18.|
 |.7.|...|...|
 |---+---+---|
 |.2.|...|...|
 |...|1..|.57|
 |...|.3.|...|
 |---+---+---|
 |..5|..2|..6|
 |..8|7..|..9|
 |6..|.49|...|
 *-----------*



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Re: April 1, 2019

Postby Cenoman » Mon Apr 01, 2019 7:13 pm

Code: Select all
 +------------------------+--------------------------+-------------------------+
 |  135     56    9       |  3456     156     8      |  7        2       345   |
 |  235     4     236     |  23569    25679   3567   |  1        8       35    |
 |  8       7     123     |  2345     125     1345   |  69       69      345   |
 +------------------------+--------------------------+-------------------------+
 |  13579   2     13467   |  45689    56789   4567   |  34689    13469   18    |
 |  39      68    346     |  1        2689    46     |  234689   5       7     |
 |  1579    568   1467    |  245689   3       4567   |  24689    1469    128   |
 +------------------------+--------------------------+-------------------------+
 |  47      9     5       | a38      a18      2      | a348      1347    6     |
 |  24     b13    8       |  7        56-1    356-1  |  2345    b134     9     |
 |  6       13    27      |  358      4       9      |  2358     137     128   |
 +------------------------+--------------------------+-------------------------+

(138=4)r7c457 - (4=31)r8c28 => -1 r8c56; lclste
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Re: April 1, 2019

Postby Ngisa » Mon Apr 01, 2019 10:42 pm

Code: Select all
+---------------------+------------------------+----------------------+
| 135     56    9     |  3456     156     8    | 7        2       345 |
| 235     4     236   |  23569    25679   3567 | 1        8       35  |
| 8       7     123   |  2345     125     1345 | 69       69      345 |
+---------------------+------------------------+----------------------+
| 13579   2     13467 |  45689    56789   4567 | 34689    13469   18  |
| 39      68    346   |  1        2689    46   | 234689   5       7   |
| 1579    568   1467  |  245689   3       4567 | 24689    1469    128 |
+---------------------+------------------------+----------------------+
|f47      9     5     |gb38      a1-8     2    |g348      1347    6   |
|e24      13    8     |  7        156     1356 |d2345     134     9   |
| 6       13    27    | b358      4       9    |c2358     137     128 |
+---------------------+------------------------+----------------------+

(8)r7c5 - (8=35)r79c4 - (5)r9c7 = (5-2)r8c7 = (2-4)r8c1 = r7c1 - (4=38)r7c47 => - 8r7c5; lclste

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Re: April 1, 2019

Postby SpAce » Mon Apr 01, 2019 11:18 pm

Code: Select all
.---------------------.---------------------------.----------------------.
|  135    56    9     | 3456    156      8        |  7        2      345 |
|  235    4     236   | 23569   25679    3567     |  1        8      35  |
|  8      7     123   | 2345    125      1345     |  69       69     345 |
:---------------------+---------------------------+----------------------:
|  13579  2     13467 | 45689   56789    4567     |  34689    13469  18  |
|  39     68    346   | 1       2689     46       |  234689   5      7   |
|  1579   568   1467  | 245689  3        4567     |  24689    1469   128 |
:---------------------+---------------------------+----------------------:
| b47     9     5     | 38      a(1)8     2       |   348    b1347   6   |
| d24     13    8     | 7        (56)-1  e3(56)-1 | e(2)345   134    9   |
|  6      13   c27    | 358       4       9       |   2358    137    128 |
'---------------------'---------------------------'----------------------'

AHS-S-Wing:

(1)r7c5 = (17)r7c81 - (7=2)r9c3 - r8c1 = (256)r8c756 => -1 r8c56; lclste
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Code: Select all
   *             |    |               |    |    *
        *        |=()=|    /  _  \    |=()=|               *
            *    |    |   |-=( )=-|   |    |      *
     *                     \  ¯  /                   *   

"If one is to understand the great mystery, one must study all its aspects, not just the dogmatic narrow view of the Jedi."
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Re: April 1, 2019

Postby Cenoman » Tue Apr 02, 2019 8:05 am

April fool's joke:
Code: Select all
 +------------------------+--------------------------+-------------------------+
 |  135     56    9       |  3456    j156     8      |  7        2       345   |
 | e235     4     236     |  23569    25679  d3567   |  1        8      e35    |
 |  8       7     123     |  2345    j125    c1345   |  69       69      345   |
 +------------------------+--------------------------+-------------------------+
 |  13579   2     13467   |  45689    56789   4567   |  34689    13469   18    |
 |  39      68    346     |  1       i2689    46     | h234689   5       7     |
 |  1579    568   1467    |  245689   3       4567   |  24689    1469    128   |
 +------------------------+--------------------------+-------------------------+
 |  47      9     5       | k38      k18      2      | a348      1347    6     |
 | f24      13    8       |  7      ja16-5  cb136-5  | g2345     134     9     |
 |  6       13    27      | k358      4       9      |  2358     137     128   |
 +------------------------+--------------------------+-------------------------+

(6)r8c5 = r8c6 - *(13)r38c6 = (3)r2c6 - (35=2)r2c19 - r8c1 = r8c7 - r5c7 = r5c5 - (256=1)r138c5 - (138=5)b8p127 => -5 r8c5, -5 r8c6*; ste
Phew! There were enough letters in the alphabet...
Edit: corrected typo. Thanks, Steve!
Last edited by Cenoman on Tue Apr 02, 2019 5:04 pm, edited 2 times in total.
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Re: April 1, 2019

Postby SteveG48 » Tue Apr 02, 2019 4:59 pm

Nice- no joke.

Typo- *(13)r38c6
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Re: April 1, 2019

Postby SCLT » Thu Aug 15, 2019 2:25 pm

Code: Select all
+---------------------+-----------------------+----------------------+
|  135    56   9      |  3456  af156    8     |  7       2      345  |
|  235    4    236    |  23569   25679  3567  |  1       8      35   |
|  8      7    123    |  2345  af2-15   1345  |  69      69     345  |
+---------------------+-----------------------+----------------------+
|  13579  2    13467  |  45689   56789  4567  |  34689   13469  18   |
|  39     68   346    |  1       2689   46    |  234689  5      7    |
|  1579   568  1467   |  245689  3      4567  |  24689   1469   128  |
+---------------------+-----------------------+----------------------+
|  47     9    5      | b38    be18     2     | b348     1347   6    |
|  24    c13   8      |  7    adf156   d1356  |  2345   c134    9    |
|  6      13   27     |  358     4      9     |  2358    137    128  |
+---------------------+-----------------------+----------------------+


Fiddling around with the same area of the grid as the first few solutions in this thread...

You can stick a seemingly pointless ALS onto the front and back of a chain in order to transform the r7c5 = 1 deduction (which would be lclste) into the better deduction r3c5 = 2 (which is stte):

(2=561)r138c5 - (1=384)r7c457 - (4=31)r8c28 - 1r8c56 = r7c5 - (1=562)r138c5 => r3c5 = 2 ; stte
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Re: April 1, 2019

Postby SpAce » Thu Aug 15, 2019 10:23 pm

SCLT wrote:Fiddling around with the same area of the grid as the first few solutions in this thread...

You can stick a seemingly pointless ALS onto the front and back of a chain in order to transform the r7c5 = 1 deduction (which would be lclste) into the better deduction r3c5 = 2 (which is stte):

Good catch!! It's quite often the case that btte solutions can be upgraded with a bit longer chain, and then it's a matter of taste which one to use. I tend to prefer a simpler btte to a redundant backpedaling chain, especially if the following basic move is very simple and obvious (like a pointing pair). However, in this case the upgrade makes more sense, and I'm pretty sure I even missed seeing the opportunity to do so. I probably thought reaching stte would take several basic moves instead of just the one easily integrated naked pair. So, well done!

(2=561)r138c5 - (1=384)r7c457 - (4=31)r8c28 - 1r8c56 = r7c5 - (1=562)r138c5 => r3c5 = 2 ; stte

PS. If left unguarded with me and my hydraulic press, it might end up as:

(1,56)r718c5 = (834)r7c547 - (43,1)r8c82,56 = (1,56)r718c5 => +1 r7c5, -56 r24c5, -5 r3c5, -6 r5c5,; stte

An acquired taste, perhaps :D Your simpler conclusion +2 r3c5 is definitely cleaner.
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