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immpy
Joined: 06 May 2017
Posts: 574
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 Posted: Sun Sep 16, 2018 1:02 pm Post subject: Wings (rated too hard) 091618 |
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Cool puzzle...enjoy everyone.
| Code: |
+-------+-------+-------+
| . . . | . . . | . . 7 |
| . 6 4 | 9 2 . | . 8 . |
| . . . | . . 1 | 6 . . |
+-------+-------+-------+
| . 1 2 | . . 8 | 7 5 . |
| 8 . . | . . . | . . 2 |
| . 5 7 | 4 . . | 8 9 . |
+-------+-------+-------+
| . . 3 | 8 . . | . . . |
| . 2 . | . 3 9 | 5 7 . |
| 7 . . | . . . | . . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
cheers...immp |
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dongrave
Joined: 06 Mar 2014
Posts: 572
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| Posted: Sun Sep 16, 2018 6:11 pm Post subject: |
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| Hmm, I've used 3 wings so far and it's still not solved! And I doubt that there's a single step solution for this one. Can one of you guys prove me wrong? |
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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 1019
Location: Rimini, Italy
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| Posted: Sun Sep 16, 2018 7:16 pm Post subject: |
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Hi everyone,
first step
| Code: |
+----------------+--------------+-------------------+
| 12359 38 1589 | 356 468 346 | 12349 1234 7 |
| 135 6 4 | 9 2 7 | 13 8 135 |
| 2359 7 589 | 35 48 1 | 6 234 3459 |
+----------------+--------------+-------------------+
| 3469 1 2 | 36 69 8 | 7 5 346 |
| 8 34 69 | 7 1569 356 | 134 1346 2 |
| 36 5 7 | 4 16 2 | 8 9 136 |
+----------------+--------------+-------------------+
| 15 49 3 | 8 7 456 | 1249 1246 1469 |
| 46 2 68 | 1 3 9 | 5 7 48 |
| 7 489 15 | 2 456 456 | 1349 1346 134689 |
+----------------+--------------+-------------------+
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Play this puzzle online at the Daily Sudoku site
XY-Wing 3,4,6 in r5c2,r68c1 and -4 in r4c1,r79c2
then
| Code: |
+----------+-----------+-------------+
| 129 3 18 | 5 468 46 | 249 124 7 |
| 15 6 4 | 9 2 7 | 3 8 15 |
| 259 7 58 | 3 48 1 | 6 24 59 |
+----------+-----------+-------------+
| 3 1 2 | 6 9 8 | 7 5 4 |
| 8 4 9 | 7 5 3 | 1 6 2 |
| 6 5 7 | 4 1 2 | 8 9 3 |
+----------+-----------+-------------+
| 15 9 3 | 8 7 456 | 24 124 16 |
| 4 2 6 | 1 3 9 | 5 7 8 |
| 7 8 15 | 2 46 456 | 49 3 169 |
+----------+-----------+-------------+
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Play this puzzle online at the Daily Sudoku site
Naked pair 1,5 in r27c1
AND
Remote Pair 1,5 in r9c3,r7c1,r2c1,r2c9 and -1 in r9c9
OR
W-Wing 1,5 in r7c1,r2c9 SL with number 1 in r9c39 and -5 in r2c1
OR
W-Wing 1,5 in r9c3,r2c9 SL with number 5 in r3c39 and -1 in r9c9
Ciao Gianni |
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immpy
Joined: 06 May 2017
Posts: 574
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| Posted: Thu Sep 20, 2018 4:59 am Post subject: |
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Beautiful solution Gianni!!! I failed to spot the Remote Pair (15) which was a key to reducing the steps needed. To dongrave; don't despair, my friend, as I used 4 wings to reach a conclusion. I started with the XY-Wing per Gianni, then spotted an XYZ-Wing (-249), which was probably an unnecessary step, and followed that with two W-Wings. The beauty of this puzzle was that one could find a variety of Wings which could be implemented in solving (hence the title). I didn't even mention the X-Wings which were also present. A wing smorgasbord this one was!
cheers all...immp |
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