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Mar 18 VH

 
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kuskey



Joined: 10 Dec 2008
Posts: 127
Location: Pembroke, NH

PostPosted: Fri Mar 18, 2011 4:36 am    Post subject: Mar 18 VH Reply with quote

Similar to a recent puzzle. A couple of one-steppers:
1. XYZ-Wing 789 pivot at r1c2 setting r3c2<>8
2. XYZ-Wing 378 pivot at r3c2 setting r1c2<>7
A couple of two steppers:
a common first step of a type 3 UR in 37 at c23 setting r39c2<>7 followed by a choice of:
1.XY-Wing 378 pivot at r3c2 setting r9c3<>7
2.XY-Wing 378 pivot r7c2 setting r9c2 and r3c3<>3
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Ema Nymton



Joined: 17 Apr 2009
Posts: 87

PostPosted: Sat Mar 19, 2011 7:20 am    Post subject: Reply with quote

.

Color me dense.

Basic

Code:

+--------------+----------------+----------+
| 89  789  6   | 4   27    5    | 1   28 3 |
| 2   1    4   | 68  68    3    | 9   7  5 |
| 5   378  378 | 27  9     1    | 4   28 6 |
+--------------+----------------+----------+
| 68  4    128 | 5   12678 2678 | 78  3  9 |
| 7   5689 289 | 3   268   268  | 58  4  1 |
| 3   58   18  | 9   178   4    | 578 6  2 |
+--------------+----------------+----------+
| 1   78   5   | 278 3     278  | 6   9  4 |
| 689 2    89  | 1   4     68   | 3   5  7 |
| 4   367  37  | 67  5     9    | 2   1  8 |
+--------------+----------------+----------+


Your step one leads logically to:

Code:

+--------------+----------------+----------+
| 89  789  6   | 4   27    5    | 1   28 3 |
| 2   1    4   | 68  68    3    | 9   7  5 |
| 5   37   378 | 27  9     1    | 4   28 6 |
+--------------+----------------+----------+
| 68  4    128 | 5   12678 2678 | 78  3  9 |
| 7   5689 289 | 3   268   268  | 58  4  1 |
| 3   58   18  | 9   178   4    | 578 6  2 |
+--------------+----------------+----------+
| 1   78   5   | 278 3     278  | 6   9  4 |
| 689 2    89  | 1   4     68   | 3   5  7 |
| 4   367  37  | 67  5     9    | 2   1  8 |
+--------------+----------------+----------+


Step two seem not to follow. What am I missing?

"Similar to a recent puzzle. A couple of one-steppers:
...
2. XYZ-Wing 378 pivot at r3c2 setting r1c2<>7"?

Ema Nymton
.
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lg161



Joined: 17 Oct 2006
Posts: 9

PostPosted: Sat Mar 19, 2011 1:46 pm    Post subject: mar 18 vh Reply with quote

I agree. The solution posted makes no sense. Could someone explain it better?
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Marty R.



Joined: 12 Feb 2006
Posts: 5175
Location: Rochester, NY, USA

PostPosted: Sat Mar 19, 2011 2:15 pm    Post subject: Reply with quote

Ema, in your first grid there should not be an 8 in r3c3 because of the 1289 quad in column 3. This will change things considerably.
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lg161



Joined: 17 Oct 2006
Posts: 9

PostPosted: Sat Mar 19, 2011 2:51 pm    Post subject: Reply with quote

Thank you Marty, that did it!
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