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VH+ 022321

 
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Tue Feb 23, 2021 5:48 pm    Post subject: VH+ 022321 Reply with quote

Hello all, enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 443

PostPosted: Wed Feb 24, 2021 5:41 pm    Post subject: Reply with quote

Code:
+-----------------+----------+---------------+
| 278  1278  9    | 14 5 47  | 678 3    168  |
| 5    178   4    | 13 6 37  | 78  9    2    |
| 3    6     17   | 2  8 9   | 5   17   4    |
+-----------------+----------+---------------+
| 248  12589 3    | 6  7 45  | 48  125  1589 |
| 2467 2579  57   | 8  3 1   | 467 2567 569  |
| 4678 1578  1578 | 45 9 2   | 3   1567 1568 |
+-----------------+----------+---------------+
| 9    35    2    | 7  4 6   | 1   8    35   |
| 1    358   6    | 35 2 358 | 9   4    7    |
| 78   4     578  | 9  1 358 | 2   56   356  |
+-----------------+----------+---------------+

(7*-4)r1c6=r4c6-(4=8)r4c7-(48=2)r4c1-(27*=8)r1c1-r1c79=r2c7 contradiction (i.e. 8r24c7) => r1c6 <> 7; stte.
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Clement



Joined: 24 Apr 2006
Posts: 1057
Location: Dar es Salaam Tanzania

PostPosted: Mon Mar 08, 2021 4:47 pm    Post subject: VH + 022321 Reply with quote

Another two stepper
Code:

+---------------------+----------------+---------------------+
| 278    1278    9    | a14   5   b47  | 678   3      fa68-1 |
| 5      178     4    | 13    6    37  | 78    9        2    |
| 3      6       17   | 2     8    9   | 5     17       4    |
+---------------------+----------------+---------------------+
| 248    12589   3    | 6     7   c45  | d48   125     e1589 |
| 2467   2579    57   | 8     3    1   | 467   2567     569  |
| 4678   1578    1578 | 45    9    2   | 3     1567    e1568 |
+---------------------+----------------+---------------------+
| 9      35      2    | 7     4    6   | 1     8        35   |
| 1      358     6    | 35    2    358 | 9     4        7    |
| 78     4       578  | 9     1    358 | 2     56       356  |
+---------------------+----------------+---------------------+

Step 1: (14)r1c94 - (4)r1c6 = r4c6 - (4=8)r4c7 - r46c9 = (8)r1c9 => - 1r1c9
Code:

+-----------------+---------------+--------------------+
| 28     128    9 | 14    5    47 | 678    3      a68  |
| 5      18     4 | 13    6    37 | 78     9       2   |
| 3      6      7 | 2     8    9  | 5      1       4   |
+-----------------+---------------+--------------------+
| 248    9      3 | 6     7   f45 | e48    25      1   |
| 246    27     5 | 8     3    1  | d46   c267     9   |
| 468    78     1 | 4-5   9    2  | 3     c567    a568 |
+-----------------+---------------+--------------------+
| 9      35     2 | 7     4    6  | 1      8      a35  |
| 1      35     6 | 35    2    8  | 9      4       7   |
| 7      4      8 | 9     1    35 | 2     b56     a356 |
+-----------------+---------------+--------------------+

Step 2: (5=8|6|3|5)r1679c9 - (5=6)r6c9 - r65c8 = (6-4)r5c7 = r4c7 - (4=5)r4c6 => - 5r6c4; stte
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