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In light of recent VHs that are only H.....

 
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immpy



Joined: 06 May 2017
Posts: 201

PostPosted: Fri Nov 30, 2018 2:07 pm    Post subject: In light of recent VHs that are only H..... Reply with quote

I post this puzzle (a VH+) because of recent VH puzzles that can be solved basically. You will need more than "our" standard VHs usually require, but only minimally I think. This particular puzzle gave me fits, personally, but it was because I simply didn't "see" the patterns. SO.....just push those brains a bit; maybe a Skyscraper, maybe a Hidden Rectangle......maybe something else (a Uniqueness Test)....and it can be done. But, also look for the VH staples, i.e. X-Wing, XY-Wing, XYZ-Wing, etc. This was a good one...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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Clement



Joined: 24 Apr 2006
Posts: 939
Location: Dar es Salaam Tanzania

PostPosted: Sun Dec 02, 2018 8:51 pm    Post subject: In light of recent VHs that are only H.... Reply with quote

Code:

+----------------+------------------------+-----------------+
| 2     9    1   | 6       8      (d35)   | 7     (c35)   4 |
| 7     6    45  | 349     39-5     2459-3| 235     1     8 |
| 45    8    3   | 1       7        245   | 25      6     9 |
+----------------+------------------------+-----------------+
| 13    5    7   | 239     1239     8     | 39      4     6 |
| 8     2    6   | 7       4       (39)   | 1      (39)   5 |
| 13    4    9   | 5       13       6     | 8       2     7 |
+----------------+------------------------+-----------------+
| 49    3    248 | 2489   a259      7     | 6      b59    1 |
| 6     1    48  | 3489    359      49-35 | 59      7     2 |
| 59    7    25  | 29      6        1     | 4       8     3 |
+----------------+------------------------+-----------------+

Skyscraper (5)rc68&r7c58
(5)r7c5 = r7c8 - r1c8 = r1c6 => - 5r2c5,r8c6
X-Wing (3)r16c68 => - 3r28c6 leads to:
Code:

+----------------+----------------------+----------------+
| 2     9    1   | 6       8       35   | 7      35    4 |
| 7     6    45  | 349     39      2459 | 235    1     8 |
| 45    8    3   | 1       7       245  | 25     6     9 |
+----------------+----------------------+----------------+
| 13    5    7   | 239     1239    8    |c39     4     6 |
| 8     2    6   | 7       4      a39   | 1     b39    5 |
| 13    4    9   | 5       13      6    | 8      2     7 |
+----------------+----------------------+----------------+
| 49    3    248 | 2489    259     7    | 6      59    1 |
| 6     1    48  | 3489    359     4-9  |d59     7     2 |
| 59    7    25  | 29      6       1    | 4      8     3 |
+----------------+----------------------+----------------+

A Kite
(9)r5c6 = r5c8 - r4c7 = r8c7 => - 9r8c6; stte
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