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A Very Interesting VH 040719

 
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immpy



Joined: 06 May 2017
Posts: 234

PostPosted: Mon Apr 08, 2019 4:41 am    Post subject: A Very Interesting VH 040719 Reply with quote

Hello all,
If anyone is trying to become more familiar with various advanced solving techniques, this puzzle has several examples of some of them. There is a rare Sue de Coq, an X-Chain, a pair of AICs, and a Hidden Rectangle just to list a few that one might choose to implement in solving. For this reason, I found it very interesting, and instructional. And yet, having stated that, it can be solved simply if one uses only VH techniques, so there is no need to use anything more, if one so chooses.

Have fun with it...enjoy the puzzle....

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 387
Location: Rimini, Italy

PostPosted: Mon Apr 08, 2019 9:38 am    Post subject: Reply with quote

Hi everyone,

Code:

+-----------------+--------------+---------------+
| 679  169  23679 | 8   4   236  | 5    1267 279 |
| 4    1569 2369  | 7   36  2356 | 1269 8    29  |
| 5678 568  267   | 1   9   256  | 4    267  3   |
+-----------------+--------------+---------------+
| 1    689  679   | 5   68  4    | 279  3    279 |
| 79   3    5     | 2   1   79   | 8    4    6   |
| 6789 2    4     | 69  368 3679 | 79   5    1   |
+-----------------+--------------+---------------+
| 3    7    69    | 469 5   689  | 12   12   48  |
| 59   459  1     | 3   2   89   | 67   67   458 |
| 2    456  8     | 46  7   1    | 3    9    45  |
+-----------------+--------------+---------------+

Play this puzzle online at the Daily Sudoku site

XYZ-Wing 6,8,9 in r7c36,r8c6 and -9 in r7c4

Ciao Gianni
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Clement



Joined: 24 Apr 2006
Posts: 974
Location: Dar es Salaam Tanzania

PostPosted: Mon Apr 08, 2019 10:45 am    Post subject: A Very Interesting VH 040719 Reply with quote

Code:

+-----------------------+---------------------+---------------------+
| 679     169     23679 | 8      4      236   | 5       1267    279 |
| 4       1569    2369  | 7      36     2356  | 1269    8       29  |
| 5678    568     267   | 1      9      256   | 4       267     3   |
+-----------------------+---------------------+---------------------+
| 1       689     679   | 5      68     4     | 279     3       279 |
| 79      3       5     | 2      1      79    | 8       4       6   |
| 6789    2       4     | 69     368    36789 | 79      5       1   |
+-----------------------+---------------------+---------------------+
| 3       7       69    |d46-9   5      689   | 12      12     c48  |
| 59      459     1     | 3      2     a89    | 67      67     b458 |
| 2       456     8     | 46     7      1     | 3       9       45  |
+-----------------------+---------------------+---------------------+

(9=8)r8c6 - r8c9 = (8-4)r7c9 = (4)r7c4 => - 9r7c4; stte
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