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Extreme 031521

 
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immpy



Joined: 06 May 2017
Posts: 574
PostPosted: Mon Mar 15, 2021 4:44 pm    Post subject: Extreme 031521 Reply with quote
Hello all, enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 572
PostPosted: Tue Mar 16, 2021 2:39 pm    Post subject: Reply with quote
Code:
+-------------+--------------+----------------+
| 278  3   9  | 57 1467 145  | 1268 1458 1278 |
| 6    27  4  | 3  8    15   | 129  159  127  |
| 78   5   1  | 9  467  2    | 68   48   3    |
+-------------+--------------+----------------+
| 123  28  23 | 4  9    7    | 5    18   6    |
| 179  79  6  | 2  5    8    | 4    3    19   |
| 49   489 5  | 1  3    6    | 7    2    89   |
+-------------+--------------+----------------+
| 2349 1   7  | 8  24   349  | 29   6    5    |
| 29   6   8  | 57 127  159  | 3    19   4    |
| 5    249 23 | 6  124  1349 | 1289 7    128  |
+-------------+--------------+----------------+

(7-2)r2c2=r1c1-(2=9)r8c1-(9=1)r8c8-(1=8)r4c8-(8=4)r3c8-(148=5)r1c8-(5=7)r1c4-r1c9=r2c9 contradiction => r2c2 <> 7; stte.
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Wed Mar 17, 2021 3:57 pm    Post subject: Extreme 031521 Reply with quote
Code:

+-----------------+-------------------+-----------------------+
| 278    3     9  |a57    1467   145  | 1268   jf148-5   1278 |
| 6      27    4  | 3     8      15   | 129      159     127  |
| 78     5     1  | 9    h467    2    |g68     if48      3    |
+-----------------+-------------------+-----------------------+
| 123   d28   d23 | 4     9      7    | 5       e18      6    |
| 179    79    6  | 2     5      8    | 4        3       19   |
| 49     489   5  | 1     3      6    | 7        2       89   |
+-----------------+-------------------+-----------------------+
| 2349   1     7  | 8     24     349  | 29       6       5    |
|b29     6     8  |b57    127   b159  | 3       b19      4    |
| 5      249  c23 | 6     124    1349 | 1289     7       128  |
+-----------------+-------------------+-----------------------+

(5=7*)r1c4 - (7=51|92)r8c4682 - (2)r8c3 = (28)r4c32 - (8)r4c8 = r13c8 - (8=6*)r3c7 - 7*6*=4)r3c5 - (4)r3c8 = (4)r1c8 => - 5r1c8; stte
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