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Feb 25 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 871
Location: Rimini, Italy
PostPosted: Sat Feb 25, 2023 11:01 am    Post subject: Feb 25 VH Reply with quote
Hi everyone,

Code:

+-------------+--------+------------+
| 7   268 468 | 3 9  1 | 5   68 246 |
| 34  356 456 | 8 2  7 | 9   1  46  |
| 1   28  9   | 6 5  4 | 37  38 27  |
+-------------+--------+------------+
| 6   9   3   | 7 1  5 | 2   4  8   |
| 58  4   58  | 9 6  2 | 1   7  3   |
| 2   1   7   | 4 8  3 | 6   9  5   |
+-------------+--------+------------+
| 34  36  46  | 5 7  9 | 8   2  1   |
| 59  7   1   | 2 34 8 | 34  56 69  |
| 589 58  2   | 1 34 6 | 347 35 79  |
+-------------+--------+------------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 3,5,8 in r39c8,r9c2 and -8 in r3c2
or
XYZ-Wing 2,6,8 in r1c28,r3c2 and -8 in r1c3
or
UR 3,4 in r89c57 and r9c7=7


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales
PostPosted: Sat Feb 25, 2023 1:07 pm    Post subject: Reply with quote
Gianni completes the basic moves before using more advanced moves to solve

But if you look at the starting grid, before any basic moves are made, the <34> UR in r89c57 just jumps out and says "play me first" to solve

Code:

+-------------------+----------------+----------------------+
| 4678   268   4678 | 3    249  1    |  5     2468   2467   |
| 34568  23568 4568 | 48   24   7    |  9     1      2346   |
| 13478  1238  9    | 6    5    48   |  2347  2348   2347   |
+-------------------+----------------+----------------------+
| 567    9     3    | 457  1    45   |  24    245    8      |
| 1568   4     568  | 9    36   2    |  13    7      135    |
| 2      15    57   | 457  8    345  |  6     9      1345   |
+-------------------+----------------+----------------------+
| 3456   356   456  | 45   7    9    |  8     23456  123456 |
| 345689 7     1    | 2   .34   3458 | .34    3456   34569  |
| 34589  358   2    | 1   .34   6    | .347   345    34579  |
+-------------------+----------------+----------------------+

Play this puzzle online at the Daily Sudoku site
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