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VH+ 100521

 
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immpy



Joined: 06 May 2017
Posts: 470

PostPosted: Tue Oct 05, 2021 7:20 pm    Post subject: VH+ 100521 Reply with quote

Hello all, enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 450

PostPosted: Wed Oct 06, 2021 7:41 pm    Post subject: Reply with quote

Thanks for the puzzle immp! I settled for a 2-step solution and each step used a chain with a contradiction. I hope some others post their solutions!
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Mogulmeister



Joined: 03 May 2007
Posts: 963

PostPosted: Fri Oct 08, 2021 3:27 am    Post subject: Reply with quote

Code:
+----------------+-------------------+---------------+
| 5    26   4    | 127   1237  8     | 267 23  9     |
| 8    3    1    | 9     6     27    | 5   4   27    |
| 26   7    9    | 25    235   4     | 268 238 1     |
+----------------+-------------------+---------------+
| 34   148  6    | 1258  12359 2359  | 128 7   25    |
| 9    18   2    | 15678 157   567   | 3   158 4     |
| 7    5    38   | 128   4     23    | 9   128 6     |
+----------------+-------------------+---------------+
| 1    289  38   | 4     2579  2579  | 27  6   2357  |
| 2346 246  5    | 267   8     1     | 247 9   237   |
| 246  2469 7    | 3     259   2569  | 124 125 8     |
+----------------+-------------------+---------------+


Nice puzzle Immp - after basics.
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Mogulmeister



Joined: 03 May 2007
Posts: 963

PostPosted: Thu Oct 14, 2021 3:00 pm    Post subject: Reply with quote

r13c8 has an ANP 23-238. IF (8=23) then puzzle solved r1c2 <> 6. However, when (23=8 ) I thought I had found a contradiction that proved r3c8 <> 8 but no...back to the drawing board .....fairly sure one could demonstrate that r3c8 <>8. (ed - you can because r6c6 becomes 3 which then creates a row of singles which in turn create multiple contradictions in blocks 8 and 9 so r3c8 def not 8 )

R3c8 <> 8 wasn't one you found was it dongrave ?
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