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Advanced 092018

 
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immpy



Joined: 06 May 2017
Posts: 235

PostPosted: Fri Sep 21, 2018 1:40 am    Post subject: Advanced 092018 Reply with quote

I had my breakthrough moment with this puzzle. Enjoy all...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 393
Location: Rimini, Italy

PostPosted: Fri Sep 21, 2018 12:20 pm    Post subject: Reply with quote

Hi everyone,

Code:

+-----------+------------+--------------+
| 5 4   9   | 2   18  7  | 18   6    3  |
| 3 178 17  | 456 46  18 | 9    45   2  |
| 6 18  2   | 45  3   9  | 1458 457  78 |
+-----------+------------+--------------+
| 9 37  457 | 8   2   6  | 45   3457 1  |
| 8 167 157 | 3   19  4  | 56   2    79 |
| 2 136 14  | 19  7   5  | 468  34   89 |
+-----------+------------+--------------+
| 1 9   6   | 7   5   3  | 2    8    4  |
| 4 2   3   | 16  168 18 | 7    9    5  |
| 7 5   8   | 49  49  2  | 3    1    6  |
+-----------+------------+--------------+

Play this puzzle online at the Daily Sudoku site

1-XY-Chain r1c7-8-r3c9-7-r5c9-9-r5c5 and -1 in r1c5

Code:

+---------+----------+------------+
| 5 4  9  | 2   8  7 | 1   6   3  |
| 3 8  7  | 456 46 1 | 9   45  2  |
| 6 1  2  | 45  3  9 | 48  457 78 |
+---------+----------+------------+
| 9 37 45 | 8   2  6 | 45  37  1  |
| 8 67 15 | 3   19 4 | 56  2   79 |
| 2 36 14 | 19  7  5 | 468 34  89 |
+---------+----------+------------+
| 1 9  6  | 7   5  3 | 2   8   4  |
| 4 2  3  | 16  16 8 | 7   9   5  |
| 7 5  8  | 49  49 2 | 3   1   6  |
+---------+----------+------------+

Play this puzzle online at the Daily Sudoku site

2-UR with 4,5 in r23c48 and -5 in r2c4,r3c8

Code:

+---------+---------+-----------+
| 5 4  9  | 2  8  7 | 1   6  3  |
| 3 8  7  | 46 46 1 | 9   5  2  |
| 6 1  2  | 5  3  9 | 48  47 78 |
+---------+---------+-----------+
| 9 37 45 | 8  2  6 | 45  37 1  |
| 8 67 15 | 3  19 4 | 56  2  79 |
| 2 36 14 | 19 7  5 | 468 34 89 |
+---------+---------+-----------+
| 1 9  6  | 7  5  3 | 2   8  4  |
| 4 2  3  | 16 16 8 | 7   9  5  |
| 7 5  8  | 49 49 2 | 3   1  6  |
+---------+---------+-----------+

Play this puzzle online at the Daily Sudoku site

3-BUG+1 in r6c7=4

Ciao Gianni
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immpy



Joined: 06 May 2017
Posts: 235

PostPosted: Fri Sep 21, 2018 5:43 pm    Post subject: Reply with quote

Indeed yes, I have conquered chains and loops...FINALLY! I followed the precise path of Gianni on this one; that XY-Chain is the key, it seems, to solving this one. The UR is a Type 6, which results in two eliminations AND two placements (5). And the BUG+1 is a nice ending technique.
This puzzle will always remain special for me in that I was able to implement a chain as a means of solving for the first time ever.
Hope all who tried it enjoyed the puzzle.

cheers...immp
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Clement



Joined: 24 Apr 2006
Posts: 977
Location: Dar es Salaam Tanzania

PostPosted: Fri Sep 21, 2018 7:50 pm    Post subject: Advanced 092018 Reply with quote

I settled with two chains
Code:

+-------------------+---------------------+-----------------------+
| 5     4       9   | 2       a18      7  | 1-8       6        3  |
| 3     178     17  | 456      46      18 | 9         45       2  |
| 6     18      2   | 45       3       9  | 1458      457     d78 |
+-------------------+---------------------+-----------------------+
| 9     37      457 | 8        2       6  | 45        3457     1  |
| 8     167     157 | 3       b19      4  | 56        2       c79 |
| 2     136     14  | 19       7       5  | 468       34       89 |
+-------------------+---------------------+-----------------------+
| 1     9       6   | 7        5       3  | 2         8        4  |
| 4     2       3   | 16       168     18 | 7         9        5  |
| 7     5       8   | 49       49      2  | 3         1        6  |
+-------------------+---------------------+-----------------------+

(1): (8=1)r1c5 - (1=9)r5c5 - (9=7)r5c9 - (7=8)r3c9 => - 8r1c7

Code:

+------------------+------------------+--------------------+
| 5     4       9  | 2       8      7 | 1       6       3  |
| 3     8       7  | 456     46     1 | 9       45      2  |
| 6     1       2  | 45      3      9 | 48      457     78 |
+------------------+------------------+--------------------+
| 9     37     f45 | 8       2      6 |e45      37      1  |
| 8     67      15 | 3       19     4 |d56      2       79 |
| 2    b36      1-4| 19      7      5 |c468    a34      89 |
+------------------+------------------+--------------------+
| 1     9       6  | 7       5      3 | 2       8       4  |
| 4     2       3  | 16      16     8 | 7       9       5  |
| 7     5       8  | 49      49     2 | 3       1       6  |
+------------------+------------------+--------------------+

(2): (4=3)r6c8 - (3=6)r6c2 - r6c7 = (6-5)r5c7 = r4c7 - (5=4)r4c3 => - 4r6c3; stte
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Aj Dimonios



Joined: 01 May 2017
Posts: 338
Location: Sassari Italy

PostPosted: Mon Sep 24, 2018 8:25 am    Post subject: Reply with quote

Hi everyone.
Code:

+-----------+------------+--------------+
| 5 4   9   | 2   18  7  | 18   6    3  |
| 3 178 17  | 456 46  18 | 9    45   2  |
| 6 18  2   | 45  3   9  | 1458 457  78 |
+-----------+------------+--------------+
| 9 37  457 | 8   2   6  | 45   3457 1  |
| 8 167 157 | 3   19  4  | 56   2    79 |
| 2 136 14  | 19  7   5  | 468  34   89 |
+-----------+------------+--------------+
| 1 9   6   | 7   5   3  | 2    8    4  |
| 4 2   3   | 16  168 18 | 7    9    5  |
| 7 5   8   | 49  49  2  | 3    1    6  |
+-----------+------------+--------------+

Play this puzzle online at the Daily Sudoku site
One step after basics
(8-7)R3C9=7R5C9-7R5C2; 8R3C9-8R6C9=(8-6)R6C7=6R5C7-6R5C2 and 8R3C9-(8=1)R3C2-1R5C2=>R5C2==>-8R3C9=>solution.
Ciao a Tutti
Paolo
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immpy



Joined: 06 May 2017
Posts: 235

PostPosted: Tue Sep 25, 2018 12:48 pm    Post subject: Reply with quote

King of the one-steppers...Paolo! Well done. Ciao a Tutti indeed.

cheers...immp
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