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May 01 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 1019
Location: Rimini, Italy
PostPosted: Wed May 01, 2019 8:42 am    Post subject: May 01 VH Reply with quote
Hi everyone,

Code:

+---------------+-------------+--------------+
| 478 13   1378 | 9  348 5    | 237  23 6    |
| 28  5    238  | 6  7   38   | 1    9  4    |
| 47  6    9    | 2  1   34   | 5    8  37   |
+---------------+-------------+--------------+
| 5   8    4    | 1  23  237  | 2379 6  2379 |
| 6   23   237  | 8  5   9    | 237  4  1    |
| 279 1239 1237 | 34 6   2347 | 8    5  237  |
+---------------+-------------+--------------+
| 289 7    6    | 5  238 1    | 4    23 2389 |
| 1   24   5    | 34 9   2348 | 6    7  238  |
| 3   249  28   | 7  248 6    | 29   1  5    |
+---------------+-------------+--------------+

Play this puzzle online at the Daily Sudoku site

XYZ-Wing 2,4,9 in r8c2,r9c27 and -2 in r9c3

Code:

+---------------+------------+--------------+
| 48  13   137  | 9  48  5   | 237  23 6    |
| 28  5    23   | 6  7   38  | 1    9  4    |
| 47  6    9    | 2  1   34  | 5    8  37   |
+---------------+------------+--------------+
| 5   8    4    | 1  23  27  | 2379 6  2379 |
| 6   23   237  | 8  5   9   | 237  4  1    |
| 279 1239 1237 | 34 6   247 | 8    5  237  |
+---------------+------------+--------------+
| 29  7    6    | 5  238 1   | 4    23 2389 |
| 1   24   5    | 34 9   248 | 6    7  238  |
| 3   249  8    | 7  24  6   | 29   1  5    |
+---------------+------------+--------------+

Play this puzzle online at the Daily Sudoku site

XY-Wing 2,3,4 in r49c5,r8c4 and -3 in r6c4,r7c5

Code:

+---------------+---------+-------------+
| 48  13   137  | 9 48 5  | 237 23 6    |
| 28  5    23   | 6 7  38 | 1   9  4    |
| 47  6    9    | 2 1  34 | 5   8  37   |
+---------------+---------+-------------+
| 5   8    4    | 1 3  27 | 279 6  279  |
| 6   23   237  | 8 5  9  | 237 4  1    |
| 279 1239 1237 | 4 6  27 | 8   5  237  |
+---------------+---------+-------------+
| 29  7    6    | 5 28 1  | 4   23 2389 |
| 1   24   5    | 3 9  48 | 6   7  28   |
| 3   249  8    | 7 24 6  | 29  1  5    |
+---------------+---------+-------------+

Play this puzzle online at the Daily Sudoku site

XY-Wing 2,4,8 in r7c5,r8c26 and -2 in r7c1

Ciao Gianni
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89
PostPosted: Tue May 07, 2019 5:52 pm    Post subject: Re: May 01 VH Reply with quote
Please sir,

I have been trying to follow your solution. But I am not able to follow your work from puzzle 1 to puzzle 2.

Specifically,
row 1 column 5 (-3); why?

puzzle 2 to puzzle 3.
row 8 column 6 (-2); why?

Thank you in advance.
Ema Nymton
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 1019
Location: Rimini, Italy
PostPosted: Tue May 07, 2019 7:08 pm    Post subject: Reply with quote
Hi Ema Nymton,

I followed this path:

from puzzle 1 to puzzle 2
after XYZ-Wing R9C3=8 -8 in R1C3 and we have a Hidden Pair 4,8 in r1c15

from puzzle 2 to puzzle 3
after XY-Wing R6C4=4 R4C5=3 and we have a Naked Pair 2,7 in r46c6 and -2 in R8C6

Ciao Gianni
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