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VH 112920

 
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Sun Nov 29, 2020 4:02 pm    Post subject: VH 112920 Reply with quote
Hello all, enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 933
Location: Rimini, Italy
PostPosted: Sun Nov 29, 2020 8:54 pm    Post subject: Reply with quote
Hi everyone,

Code:

+----------------+---------------+----------------+
| 13  7     2    | 36  1369  8   | 69  5     4    |
| 134 5     9    | 7   12346 246 | 26  8     12   |
| 6   14    8    | 24  1249  5   | 3   27    1279 |
+----------------+---------------+----------------+
| 47  346   1    | 9   8     246 | 27  23467 5    |
| 458 34689 356  | 1   246   7   | 289 2346  2389 |
| 2   89    67   | 46  5     3   | 1   467   89   |
+----------------+---------------+----------------+
| 178 138   4    | 238 237   9   | 5   237   6    |
| 578 2     3567 | 368 367   1   | 4   9     378  |
| 9   368   367  | 5   23467 246 | 278 1     2378 |
+----------------+---------------+----------------+

Play this puzzle online at the Daily Sudoku site

XY-Chain r6c4-6-r1c4-3-r1c1-1-r3c2 and -4 in r3c4

Code:

+--------------+---------------+-------------+
| 13  7    2   | 36  1369  8   | 69  5  4    |
| 13  5    9   | 7   1346  46  | 26  8  12   |
| 6   4    8   | 2   19    5   | 3   7  19   |
+--------------+---------------+-------------+
| 4   36   1   | 9   8     26  | 7   23 5    |
| 58  3689 356 | 1   26    7   | 289 4  2389 |
| 2   89   7   | 4   5     3   | 1   6  89   |
+--------------+---------------+-------------+
| 78  1    4   | 38  237   9   | 5   23 6    |
| 578 2    356 | 368 367   1   | 4   9  378  |
| 9   368  36  | 5   23467 246 | 28  1  2378 |
+--------------+---------------+-------------+

Play this puzzle online at the Daily Sudoku site

Skyscraper with number 2 in r4c68,r7c58 and -2 in r5c5,r9c6

Ciao Gianni
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Tue Dec 01, 2020 11:23 am    Post subject: VH 112920 Reply with quote
Code:

+--------------------+--------------------+--------------------+
| 13    7       2    |  36    1369    8   | 69    5       4    |
| 134   5       9    |  7     12346   246 | 26    8       12   |
| 6     14      8    | c24    1249    5   | 3    b27      1279 |
+--------------------+--------------------+--------------------+
| 47    346     1    |  9     8       246 | 27    23467   5    |
| 458   34689   356  |  1     246     7   | 289   2346    2389 |
| 2     4689   a7-6  |da46    5       3   | 1    a467     789  |
+--------------------+--------------------+--------------------+
| 178   138     4    | 238    237     9   | 5     237     6    |
| 578   2       3567 | 368    367     1   | 4     9       378  |
| 9     368     367  | 5      23467   246 | 278   1       2378 |
+--------------------+--------------------+--------------------+

Step 1: 647r6c348 - (7=2)r3c8 - (2=4)r3c4 - (4=6)r6c4 => - 6r6c3
Code:

+--------------------+---------------------+-------------------+
| 13     7       2   | 36     1369     8   | 69     5     4    |
| 13     5       9   | 7      1346     46  | 26     8     12   |
| 6      4       8   | 2      19       5   | 3      7     19   |
+--------------------+---------------------+-------------------+
| 4      36      1   | 9      8       b26  | 7     c23    5    |
| 58     3689    356 | 1      26       7   | 289    4     2389 |
| 2      89      7   | 4      5        3   | 1      6     89   |
+--------------------+---------------------+-------------------+
| 78     1       4   | 38     237      9   | 5     d23    6    |
| 578    2       356 | 368    367      1   | 4      9     378  |
| 9      368     36  | 5      23467   a246 | 8-2    1     378-2|
+--------------------+---------------------+-------------------+

Step 2: (2)r9c6 = r4c6 - r4c8 = (2)r7c8 => - 2r9c79; stte
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dongrave



Joined: 06 Mar 2014
Posts: 568
PostPosted: Tue Dec 01, 2020 5:18 pm    Post subject: Reply with quote
Wow! Nice solutions! From looking at Gianni's and Clement's solutions I'm guessing that this must be a VH+ puzzle?
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Tue Dec 01, 2020 5:55 pm    Post subject: Reply with quote
Solution can be achieved with three XY-Wings, and then the Skyscraper on 2 as Gianni used to finish. That's why I left it as a VH rating. Chains can be bypassed.

cheers...immp
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Tue Dec 01, 2020 6:05 pm    Post subject: Reply with quote
First XY-Wing: 6/7/-4 in r4c1,r6c34=>r4c6<>4

Last edited by immpy on Wed Dec 02, 2020 5:19 pm; edited 3 times in total
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Tue Dec 01, 2020 6:07 pm    Post subject: Reply with quote
Second XY-Wing: 4/6/-2 in r36c4,r4c6=>r2c6<>2
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Tue Dec 01, 2020 6:10 pm    Post subject: Reply with quote
Third XY-Wing: 4/6/-2 in r2c67,r3c4=>r2c5,r3c89<>2
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dongrave



Joined: 06 Mar 2014
Posts: 568
PostPosted: Tue Dec 01, 2020 8:16 pm    Post subject: Reply with quote
Ah, I see! Thanks for the info immpy!
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