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VH+ 062822

 
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immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Tue Jun 28, 2022 6:52 pm    Post subject: VH+ 062822 Reply with quote

Hello all, enjoy the puzzle.

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Wed Jun 29, 2022 10:24 am    Post subject: Reply with quote

1st step, remove <4> from r1c6 with 457 XY wing abc
Code:

+---------------------+------------------+------------------------+
| 2       6     15    | 9      8     -45 | 1457     3      1457   |
| 3       8     7     | 1     b45     2  | 456      56     9      |
| 159     4     159   | 7      3      6  | 1258     58     125    |
+---------------------+------------------+------------------------+
| 15678   237   12356 | 4      9      57 | 125678   5678   123567 |
| 567     9     2356  | 8      257    1  | 2567     4      23567  |
| 1578    27    4     | 25     6      3  | 125789   5789   1257   |
+---------------------+------------------+------------------------+
| 679     237   2369  | 235    1      8  | 45679    5679   4567   |
| 4       1     8     | 6     a57     9  | 3        2      57     |
| 679     5     2369  | 23     247   c47 | 4679     1      8      |
+---------------------+------------------+------------------------+

Play this puzzle online at the Daily Sudoku site

2nd step remove <7> from r6c9 (and others) with X wing on <7> in r67c28
3rd step remove <5> from r6c9 with XY chain abcd pincers on <5> in a+d
basic moves lead to remove <2> from r6c2 to solve

Code:

+------------------+--------------+----------------------+
| 2     6     1    | 9     8    5 | 47       3    47     |
| 3     8     7    | 1     4    2 | 56       56   9      |
| 59    4     59   | 7     3    6 | 12       8    12     |
+------------------+--------------+----------------------+
| 18    23    2356 | 4     9    7 | 12568    56   12356  |
| 567   9     2356 | 8    b25   1 | 2567     4    23567  |
| 18   x27    4    | a25   6    3 | 125789  x79   12-57  |
+------------------+--------------+----------------------+
| 679  x237   2369 | 235   1    8 | 45679   x79   4567   |
| 4     1     8    | 6    c57   9 | 3        2   d57     |
| 679   5     2369 | 23    27   4 | 679      1    8      |
+------------------+--------------+----------------------+

Play this puzzle online at the Daily Sudoku site
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dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Wed Jun 29, 2022 8:12 pm    Post subject: Reply with quote

Nice going Tom! And thanks for the puzzle immp! I really enjoyed that. I used a pencil and paper and saw that if r8c9 was 7, you'd reach a contradiction (i.e. 7 in r4c6 and in r4c8) which solved it in one step - but boy what a step!
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immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Tue Jul 05, 2022 9:11 pm    Post subject: Reply with quote

Always welcome dongrave.
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