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VH+ 062717

 
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immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Tue Jun 27, 2017 2:37 pm    Post subject: VH+ 062717 Reply with quote

This one was interesting. Maybe you will think so too.
Enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Wed Jun 28, 2017 10:44 am    Post subject: Reply with quote

Hi Immpy

My solution

Code:

+----------------+-------------+-------------+
| 3    46    456 | 2   1   8   | 69  7   569 |
| 7    26    9   | 5   36  4   | 1   38  268 |
| 1    8     256 | 369 369 7   | 236 4   256 |
+----------------+-------------+-------------+
| 4568 246   7   | 1   249 69  | 269 589 3   |
| 456  12346 246 | 349 8   369 | 7   159 269 |
| 9    1236  268 | 37  237 5   | 4   18  268 |
+----------------+-------------+-------------+
| 2    7     1   | 39  5   39  | 8   6   4   |
| 46   9     3   | 8   46  1   | 5   2   7   |
| 468  5     468 | 467 467 2   | 39  39  1   |
+----------------+-------------+-------------+

Play this puzzle online at the Daily Sudoku site
Forcing chains [(6)R2C2-(6=4)R1C2 and (6-2)R2C2=(2)R2C9-(2)R5C9=(2)R5C23-(2)R4C2;(6)R2C2-(6)R4C2]=(4)R4C2=>contradiction two 4 in column 2=>-6R2C2.
4 fin swordfish (column 2, column 3, column 4, fin 4 R4C2)=>-4R5C1
6 fin swordfish (line 2, line 6, line 8, fin 6 R6C3)=>-6R45C1
Forcing chains [(4)R9C4-(4)R5C4=(4)R5C3-(4)R4C2 and (4-6)R9C4=(6)R3C4-(6)R2C5=(6)R2C9-(6)R56C9=(6)R4C7-(6)R4C2] =>contradiction R4C2=Ø=>-4R9C4=>stte.

Ciao a tutti
Paolo
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Wed Jun 28, 2017 4:44 pm    Post subject: Reply with quote

Sorry, I replace the previous message with the following. I found a typing error on the first forcing chain.

Code:

+--------------+-------------+-------------+
| 3    46  456 | 2   1   8   | 69  7   569 |
| 7    26  9   | 5   36  4   | 1   38  268 |
| 1    8   256 | 369 369 7   | 236 4   256 |
+--------------+-------------+-------------+
| 4568 246 7   | 1   249 69  | 269 589 3   |
| 456  13  246 | 349 8   369 | 7   159 269 |
| 9    13  268 | 37  237 5   | 4   18  268 |
+--------------+-------------+-------------+
| 2    7   1   | 39  5   39  | 8   6   4   |
| 46   9   3   | 8   46  1   | 5   2   7   |
| 468  5   468 | 467 467 2   | 39  39  1   |
+--------------+-------------+-------------+

Play this puzzle online at the Daily Sudoku site
Forcing chains (6)R2C2-(6=4)R1C2;[ (6-2)R2C2=(2)R2C9-(2)R56C9=(2)R4C7-(2)R4C2 and (6)R2C2-(6)R4C2]=(4)R4C2=>contradiction two 4 in column 2=>-6R2C2.
4 fin swordfish (column 2, column 3, column 4, fin 4 R4C2)=>-4R5C1
6 fin swordfish (line 2, line 6, line 8, fin 6 R6C3)=>-6R45C1
Forcing chains [(4)R9C4-(4)R5C4=(4)R5C3-(4)R4C2 and (4-6)R9C4=(6)R3C4-(6)R2C5=(6)R2C9-(6)R56C9=(6)R4C7-(6)R4C2] =>R4C2=Ø=>-4R9C4=>stte.
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