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Advanced 060219

 
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Sun Jun 02, 2019 12:52 pm    Post subject: Advanced 060219 Reply with quote
Hello all,
It seemed to me that this puzzle had a little bit of everything along the advanced trail (depending on one's path). I will be interested in seeing what some of our astute community solvers come up with for a potential path. I needed at least 6 steps....main thing is...enjoy the puzzle.

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
PostPosted: Sun Jun 02, 2019 7:24 pm    Post subject: Reply with quote
Hi everyone,

Code:

+------------+----------------+--------------+
| 15 9  7    | 2   15    46   | 8   36   346 |
| 25 8  3    | 679 45679 469  | 269 1    246 |
| 6  4  12   | 8   19    3    | 29  7    5   |
+------------+----------------+--------------+
| 4  37 2568 | 679 26789 2689 | 1   2356 236 |
| 9  1  26   | 4   3     5    | 26  8    7   |
| 28 37 2568 | 1   2678  268  | 4   2356 9   |
+------------+----------------+--------------+
| 7  2  4    | 3   69    1    | 5   69   8   |
| 3  5  18   | 69  248   248  | 7   269  126 |
| 18 6  9    | 5   28    7    | 3   4    12  |
+------------+----------------+--------------+

Play this puzzle online at the Daily Sudoku site

X-Wing with number 2 in r35c37 and -2 in r2c7,r46c3

Code:

+-----------+----------------+-------------+
| 15 9  7   | 2   15    46   | 8  36   346 |
| 25 8  3   | 679 45679 469  | 69 1    246 |
| 6  4  12  | 8   19    3    | 29 7    5   |
+-----------+----------------+-------------+
| 4  37 568 | 679 26789 2689 | 1  2356 236 |
| 9  1  26  | 4   3     5    | 26 8    7   |
| 28 37 568 | 1   2678  268  | 4  2356 9   |
+-----------+----------------+-------------+
| 7  2  4   | 3   69    1    | 5  69   8   |
| 3  5  18  | 69  248   248  | 7  269  126 |
| 18 6  9   | 5   28    7    | 3  4    12  |
+-----------+----------------+-------------+

Play this puzzle online at the Daily Sudoku site

XYZ-Wing 4,6,9 in r1c6,r2c67 and -6 in r2c45

Code:

+-----------+---------------+-------------+
| 15 9  7   | 2   15    46  | 8  36   346 |
| 25 8  3   | 79  4579  469 | 69 1    246 |
| 6  4  12  | 8   19    3   | 29 7    5   |
+-----------+---------------+-------------+
| 4  37 568 | 679 26789 289 | 1  2356 236 |
| 9  1  26  | 4   3     5   | 26 8    7   |
| 28 37 56  | 1   67    28  | 4  356  9   |
+-----------+---------------+-------------+
| 7  2  4   | 3   69    1   | 5  69   8   |
| 3  5  18  | 69  248   248 | 7  269  126 |
| 18 6  9   | 5   28    7   | 3  4    12  |
+-----------+---------------+-------------+

Play this puzzle online at the Daily Sudoku site

W-Wing 2,8 in r6c6,r9c5 SL with number 8 in r69c1 and -2 in r4c5,r8c6

Code:

+-----------+--------------+-------------+
| 15 9  7   | 2   15   46  | 8  36   346 |
| 25 8  3   | 79  4579 469 | 69 1    246 |
| 6  4  12  | 8   19   3   | 29 7    5   |
+-----------+--------------+-------------+
| 4  37 568 | 679 6789 289 | 1  2356 236 |
| 9  1  26  | 4   3    5   | 26 8    7   |
| 28 37 56  | 1   67   28  | 4  356  9   |
+-----------+--------------+-------------+
| 7  2  4   | 3   69   1   | 5  69   8   |
| 3  5  18  | 69  248  48  | 7  269  126 |
| 18 6  9   | 5   28   7   | 3  4    12  |
+-----------+--------------+-------------+

Play this puzzle online at the Daily Sudoku site

Skyscraper with number 8 in r6c16,r9c15 and -8 in r4c5,r8c6

Ciao Gianni
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Mon Jun 03, 2019 12:03 pm    Post subject: Reply with quote
Hi everyone
After basics
Code:

+------------+----------------+--------------+
| 15 9  7    | 2   15    46   | 8   36   346 |
| 25 8  3    | 679 45679 469  | 269 1    246 |
| 6  4  12   | 8   19    3    | 29  7    5   |
+------------+----------------+--------------+
| 4  37 2568 | 679 26789 2689 | 1   2356 236 |
| 9  1  26   | 4   3     5    | 26  8    7   |
| 28 37 2568 | 1   2678  268  | 4   2356 9   |
+------------+----------------+--------------+
| 7  2  4    | 3   69    1    | 5   69   8   |
| 3  5  18   | 69  248   248  | 7   269  126 |
| 18 6  9    | 5   28    7    | 3   4    12  |
+------------+----------------+--------------+

Play this puzzle online at the Daily Sudoku site
One step after basics.
If R9C5=8 =>contradiction R3C5=Ø
8R9C5-(8=1)R9C1-1R1C1=1R1C5-1R3C5;
8R9C5-8R9C1=8R6C1-8R6C56;
8R9C5-8R4C5=(8-9)R4C6=9R2C6-9R3C5=> R3C5=Ø=>R9C5=2=>solution.
Ciao a Tutti
Paolo
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Mon Jun 03, 2019 6:48 pm    Post subject: Advanced 060219 Reply with quote
Code:

+-------------------+-------------------------+-----------------------+
|g15     9     7    | 2      f15       c(46)  |8       b36      c3(46)|
| 25     8     3    | 679     45679   dc(46)9 |269      1      bc2(46)|
| 6      4     12   | 8      e19         3    |29       7        5    |
+-------------------+-------------------------+-----------------------+
| 4      37    2568 | 679     26789      2689 | 1       2356     236  |
| 9      1     26   | 4       3          5    | 26      8        7    |
| 28     37    2568 | 1       2678       268  | 4       2356     9    |
+-------------------+-------------------------+-----------------------+
| 7      2     4    | 3       69         1    | 5      b69       8    |
| 3      5     18   | 69      248        248  | 7      b269      126  |
| 8-1    6     9    | 5       28         7    | 3       4       a12*  |
+-------------------+-------------------------+-----------------------+

(1=2*)r9c9 - [(2)r2c9&(2=963)r178c8] - (32=46)r12c9 Type 1 UR(46)r12c69 - (46=9)r2c6 - (9=1)r3c5 - r1c5 = (1)r1c1 => -1r9c1; stte
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Tue Jun 04, 2019 5:07 pm    Post subject: Reply with quote
Nice solutions, folks. I basically followed Gianni's path, probably with a few unnecessary steps added, because I missed a more efficient technique.

cheers...immp
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