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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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 Posted: Sun Sep 18, 2011 3:37 am Post subject: |
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| Bud wrote: | Thanks Marty,
The example in the link looked like a pattern and I was able to follow Keith's logic. But the example here is completely different and still looks like an example of XY-Chain forcing.
Bud |
Let's try this again. Here's how I find these gM-wings: | Code: | +----------------+----------------+----------------+
| 9 6 2 | 378b 5 37 | 48c 1 34 |
| 8 5 4 | 123 6 13 | 9 7 23 |
| 7 1 3 | 28 9 4 | 5 68 26 |
+----------------+----------------+----------------+
| 3 49 78 | 5 1 67 | 2 4689 469 |
| 1 2 6 | 9 4 8 | 3 5 7 |
| 5 49 78a | 67 3 2 |4-8 4689 1 |
+----------------+----------------+----------------+
| 2 7 1 | 34 8 35 | 6 49 459 |
| 46 3 5 | 46 7 9 | 1 2 8 |
| 46 8 9 | 146 2 156 | 7 3 45 |
+----------------+----------------+----------------+ |
(This is Nataraj' example.) Start with a bivalue cell, for example:
7 in a forces 7 in b. BC is a strong link on 8. Not 8 in b forces 8 in c. So:
1) a may be 8, or
2) a may be 7. In that case, b is 7 and c is 8. ac are pincers on 8.
I think these gM-wings are easy to find, and they are much more common than my original classic M-wing.
But, I do not see others using them. They are not extra work - I look for them along with W-wings and other remote pair variants.
Keith |
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