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kuskey
Joined: 10 Dec 2008 Posts: 141 Location: Pembroke, NH
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Posted: Fri Mar 18, 2011 4:36 am Post subject: Mar 18 VH |
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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: 89
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Posted: Sat Mar 19, 2011 7:20 am Post subject: |
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.
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 |
+--------------+----------------+----------+
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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 |
+--------------+----------------+----------+
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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: 12
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Posted: Sat Mar 19, 2011 1:46 pm Post subject: mar 18 vh |
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I agree. The solution posted makes no sense. Could someone explain it better? |
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Sat Mar 19, 2011 2:15 pm Post subject: |
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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: 12
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Posted: Sat Mar 19, 2011 2:51 pm Post subject: |
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Thank you Marty, that did it! |
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