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keith
Joined: 19 Sep 2005 Posts: 3355 Location: near Detroit, Michigan, USA
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Posted: Sat Jun 30, 2012 8:49 pm Post subject: YAM |
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YAM: Yet another Menneske.
Code: | M4636742sh(18)
+-------+-------+-------+
| . . 3 | 2 . 7 | 6 . . |
| . . . | 8 . 5 | 7 . 2 |
| 7 . . | . 3 . | . . 4 |
+-------+-------+-------+
| 9 7 . | . . . | . 4 1 |
| . . 4 | . . . | 3 . . |
| 2 3 . | . . . | . 6 8 |
+-------+-------+-------+
| 3 2 . | . 8 . | . . 5 |
| . . . | 5 . 3 | . . . |
| . 1 7 | 4 . 6 | 8 . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
Keith |
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Sun Jul 01, 2012 1:05 am Post subject: |
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This was embarrassingly difficult for me. I know there's something in there that I couldn't spot. Without getting into the gory details, I used an AIC which took out some 2s, a Skyscraper on 1 and an XY-Chain zapping some 9s.
I think this was my grid after basics:
Code: |
+------------+------------+----------+
| 148 458 3 | 2 14 7 | 6 158 9 |
| 146 469 19 | 8 149 5 | 7 3 2 |
| 7 589 2 | 6 3 19 | 15 158 4 |
+------------+------------+----------+
| 9 7 58 | 3 6 28 | 25 4 1 |
| 168 68 4 | 19 159 28 | 3 25 7 |
| 2 3 15 | 17 157 4 | 9 6 8 |
+------------+------------+----------+
| 3 2 6 | 179 8 19 | 4 179 5 |
| 48 489 89 | 5 127 3 | 12 127 6 |
| 5 1 7 | 4 29 6 | 8 29 3 |
+------------+------------+----------+
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Play this puzzle online at the Daily Sudoku site |
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keith
Joined: 19 Sep 2005 Posts: 3355 Location: near Detroit, Michigan, USA
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Posted: Sun Jul 01, 2012 2:59 am Post subject: |
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After basics:
Code: | +-------------+-------------+-------------+
| 148 458 3 | 2 14 7 | 6 158 9 |
| 146 469 19 | 8 149 5 | 7 3 2 |
| 7 589 2 | 6 3 @19 |B#15 158 4 |
+-------------+-------------+-------------+
| 9 7 58 | 3 6 28 | 25 4 1 |
| 168 68 4 | 19 159 28 | 3 25 7 |
| 2 3 A15 | 17 C-157 4 | 9 6 8 |
+-------------+-------------+-------------+
| 3 2 6 | 179 8 @19 | 4 -179 5 |
| 48 489 89 | 5 -127 3 |#12 127 6 |
| 5 1 7 | 4 29 6 | 8 29 3 |
+-------------+-------------+-------------+ |
SS on 1 in C67. Also, AB are a W-wing, eliminating 1 in C. Leading to:
Code: | +-------------+-------------+-------------+
| 148 458 3 | 2 14 7 | 6 158 9 |
| 146 469 19 | 8 149 5 | 7 3 2 |
| 7 589 2 | 6 3 19 |B15 158 4 |
+-------------+-------------+-------------+
| 9 7 58 | 3 6 28 | 25 4 1 |
| 168 68 4 | 19 159 28 | 3 25 7 |
| 2 3 A15 | 17 E57 4 | 9 6 8 |
+-------------+-------------+-------------+
| 3 2 6 | 179 8 19 | 4 79 5 |
| 48 489 89 | 5 D27 3 |C12 127 6 |
| 5 1 7 | 4 29 6 | 8 29 3 |
+-------------+-------------+-------------+ |
AB, the W-wing, are pincers on 1. Also, AC are pincers on 1, look at CDEA. BC are a strong link on 1.
This is all possible only if A is 1.
(A and / or B is true. A and / or C is true. B and C are not both true. Then, A must be true.)
Keith |
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Sun Jul 01, 2012 3:50 am Post subject: |
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Thanks. I played the Skyscraper, missed the W-Wing and would've never figured out the last move. |
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daj95376
Joined: 23 Aug 2008 Posts: 3854
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Posted: Sun Jul 01, 2012 5:59 am Post subject: |
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keith wrote: | After basics:
Code: | +-------------+-------------+-------------+
| 148 458 3 | 2 14 7 | 6 158 9 |
| 146 469 19 | 8 149 5 | 7 3 2 |
| 7 589 2 | 6 3 @19 |B#15 158 4 |
+-------------+-------------+-------------+
| 9 7 58 | 3 6 28 | 25 4 1 |
| 168 68 4 | 19 159 28 | 3 25 7 |
| 2 3 A15 | 17 C-157 4 | 9 6 8 |
+-------------+-------------+-------------+
| 3 2 6 | 179 8 @19 | 4 -179 5 |
| 48 489 89 | 5 -127 3 |#12 127 6 |
| 5 1 7 | 4 29 6 | 8 29 3 |
+-------------+-------------+-------------+ |
SS on 1 in C67. Also, AB are a W-wing, eliminating 1 in C. Leading to:
|
Code: | after basics
+-----------------------------------------------------+
| 148 458 3 | 2 f14 7 | 6 158 9 |
| 146 469 19 | 8 f149 5 | 7 3 2 |
| 7 589 2 | 6 3 e19 | d15 158 4 |
|-----------------+-----------------+-----------------|
| 9 7 b58 | 3 6 28 | c25 4 1 |
| 168 68 4 | 19 159 28 | 3 25 7 |
| 2 3 a15 | 17 57-1 4 | 9 6 8 |
|-----------------+-----------------+-----------------|
| 3 2 6 | 179 8 19 | 4 179 5 |
| 48 489 89 | 5 127 3 | 12 127 6 |
| 5 1 7 | 4 29 6 | 8 29 3 |
+-----------------------------------------------------+
# 51 eliminations remain
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Assuming that your W-Wing is a-b-c-d, then you need to extend it through -e-f in order to get r6c5<>1. |
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keith
Joined: 19 Sep 2005 Posts: 3355 Location: near Detroit, Michigan, USA
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Posted: Sun Jul 01, 2012 10:47 am Post subject: |
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daj95376 wrote: | Assuming that your W-Wing is a-b-c-d, then you need to extend it through -e-f in order to get r6c5<>1. | Yes.
Keith |
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