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Jan 14 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 377
Location: Rimini, Italy

PostPosted: Mon Jan 14, 2019 1:59 pm    Post subject: Jan 14 VH Reply with quote

Hi everyone,

Code:

+---------+-----------------+-------------+
| 3  9  8 | 146 12456 12567 | 25 127  45  |
| 17 4  6 | 9   1235  1257  | 8  1237 35  |
| 17 5  2 | 34  8     17    | 6  39   349 |
+---------+-----------------+-------------+
| 5  26 9 | 7   136   16    | 4  236  8   |
| 8  7  3 | 2   569   4     | 1  69   59  |
| 4  26 1 | 36  3569  8     | 25 2369 7   |
+---------+-----------------+-------------+
| 29 1  4 | 5   7     29    | 3  8    6   |
| 26 8  7 | 46  246   3     | 9  5    1   |
| 69 3  5 | 8   169   169   | 7  4    2   |
+---------+-----------------+-------------+

Play this puzzle online at the Daily Sudoku site

first step
W-Wing 1,6 in r4c6,r9c5 SL with number 6 in r1c56 and -1 in r4c5,r9c6
or
UR 1,6 in r49c56 and -1 in r4c5,r9c6

Code:

+---------+------------+---------+
| 3  9  8 | 146 46  56 | 2 7  45 |
| 7  4  6 | 9   23  25 | 8 1  35 |
| 1  5  2 | 34  8   7  | 6 9  34 |
+---------+------------+---------+
| 5  26 9 | 7   36  1  | 4 23 8  |
| 8  7  3 | 2   5   4  | 1 6  9  |
| 4  26 1 | 36  9   8  | 5 23 7  |
+---------+------------+---------+
| 29 1  4 | 5   7   29 | 3 8  6  |
| 26 8  7 | 46  246 3  | 9 5  1  |
| 69 3  5 | 8   1   69 | 7 4  2  |
+---------+------------+---------+

Play this puzzle online at the Daily Sudoku site

second step
BUG+1 r8c5=6
or
W-Wing 4,6 in r1c5,r8c4 SL with number 6 in r19c6 and -4 in r3c4,r8c5
or
XY-Wing 3,4,6 in r14c5,r3c4 and -3 in r2c5,r6c4
or
XY-Wing 3,4,6 in r1c5,r36c4 and -6 in r4c5

Ciao Gianni
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RobertRattley



Joined: 24 Jun 2007
Posts: 104
Location: Australia

PostPosted: Fri Jan 18, 2019 9:17 pm    Post subject: Reply with quote

In the first diagram, the 1 for column 4 must be in row 1.

After quite a few additional "basics", there is a 2 step traditional wing solution: xy wing 346 pinching row 4 col 5 on 6 followed by xy wing 136 pinching row 8 col 4 on 6.
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 377
Location: Rimini, Italy

PostPosted: Fri Jan 18, 2019 10:45 pm    Post subject: Reply with quote

Hi Everyone
Yes, excuse me,
this is the first correct scheme, on which to apply the W-Wing or UR

Code:

+---------+------------+---------+
| 3  9  8 | 1  46  56  | 2 7  45 |
| 7  4  6 | 9  23  25  | 8 1  35 |
| 1  5  2 | 34 8   7   | 6 9  34 |
+---------+------------+---------+
| 5  26 9 | 7  136 16  | 4 23 8  |
| 8  7  3 | 2  5   4   | 1 6  9  |
| 4  26 1 | 36 9   8   | 5 23 7  |
+---------+------------+---------+
| 29 1  4 | 5  7   29  | 3 8  6  |
| 26 8  7 | 46 246 3   | 9 5  1  |
| 69 3  5 | 8  16  169 | 7 4  2  |
+---------+------------+---------+

Play this puzzle online at the Daily Sudoku site

also the second scheme is affected by the incorrect cleaning of the various cells.
Maybe I did not activate the auto sweep.

Ciao Gianni
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RobertRattley



Joined: 24 Jun 2007
Posts: 104
Location: Australia

PostPosted: Sat Jan 19, 2019 2:41 pm    Post subject: Reply with quote

Auto sweep? Goodness! I don't use auto anything.

I print each day's puzzle and work on it on paper. I have always been able to solve each puzzle and don't consult this site until I have done so.

And I thoroughly enjoy myself.

(By the way, as to "traditional" methods, since this site was first established there has never been a puzzle that could not be solved using "basics", or x or xy or xyz wings, and I recall indirect word from the dailysudoku's creator that we can expect this to remain the case. Still, I appreciate the input from Gianni and everyone else.)
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immpy



Joined: 06 May 2017
Posts: 233

PostPosted: Sun Jan 20, 2019 3:39 am    Post subject: Reply with quote

That's how I do the puzzles too Robert. Nice to hear there are still "pencil and paper" solvers around and about. Keep enjoying!

cheers...immp
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