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Advanced puzzle 111418

 
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Wed Nov 14, 2018 1:43 pm    Post subject: Advanced puzzle 111418 Reply with quote
This one was cool, I thought. Enjoy everyone...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Thu Nov 15, 2018 10:48 am    Post subject: Reply with quote
Hi everyone.
Code:

+---------------+--------------+---------+
| 27  4    27   | 5    8   3   | 1  9  6 |
| 5   3    9    | 4    6   1   | 7  8  2 |
| 16  16   8    | 9    27  27  | 4  3  5 |
+---------------+--------------+---------+
| 9    67  13   | 13   5   678 | 68 2  4 |
| 4   5    236  | 238  23  9   | 68 7  1 |
| 8    267 1267 | 127  4   267 | 9  5  3 |
+---------------+--------------+---------+
|  26 9    1246 | 238  123 28  | 5  14 7 |
| 3   8     47  | 6    17  5   | 2  14 9 |
| 127 127  5    | 27   9   4   | 3  6  8 |
+---------------+--------------+---------+

Play this puzzle online at the Daily Sudoku site
One step after basics
If R9C4=2=>contradiction =>-2R9C4=>solution
(2-7)R9C4=7R8C5-7R3C5; 2R9C4-2R5C4 and 2R9C4-2R9C2=R6C2-2R5C3=2R5C5-2R3C5 =>R3C5=Ø therefore the initial hypothesis R9C4 = 2 is incorrect and consequently R9C4 = 7 is true.R9C4=7=>stte.
Ciao a Tutti
Paolo
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Thu Nov 15, 2018 9:00 pm    Post subject: Advanced puzzle 111418 Reply with quote
Code:

+----------------------+---------------------+-----------------+
| 27      4       27   | 5       8       3   | 1      9      6 |
| 5       3       9    | 4       6       1   | 7      8      2 |
| 16      16      8    | 9       27      27  | 4      3      5 |
+----------------------+---------------------+-----------------+
| 9       67     c13*  |b13      5      b678 |c68     2      4 |
| 4       5      e236  | 238     23      9   |d6*8    7      1 |
| 8      f267     1267 | 127     4       267 | 9      5      3 |
+----------------------+---------------------+-----------------+
| 126     9       246  |a238     123    a28  | 5      14     7 |
| 3       8       47   | 6       17      5   | 2      14     9 |
| 127    g127     5    |a7-2     9       4   | 3      6      8 |
+----------------------+---------------------+-----------------+

283r9c4|r7c46 - (38)r4c46 = (3*)r4c3&(8-6)r4c7 = (6*)r5c7 - (3*6*=2)r5c3 - r6c2 = r9c2 => - 2r9c4; stte
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