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experts
Joined: 18 Dec 2011
Posts: 2
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 Posted: Sun Dec 18, 2011 6:36 pm Post subject: having difficulty going further withing guessing |
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Anyone care to help? What technique should be used to go further?
Thanks!
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Dec 18, 2011 8:19 pm Post subject: |
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Just for openers, note that the 4s in box 6 are locked in r4.
Also note the 239 triple in c4 and the 57 pair in c7.
I don't know if that'll get you anywhere, but it's always a good idea to clean up the basics. |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Sun Dec 18, 2011 9:33 pm Post subject: |
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Basics (Locked Candidates, Locked Subsets, Fishes) solve the puzzle. However, from the Box 3, one gets :
Either r3c7=5, r5c7=7; Or r3c8=5, r8c8=7, r4c5=7. In both cases, r4c789 and r5c6 <> 7 => r4c9=9 and singles to the end.
Last edited by JC Van Hay on Sun Dec 18, 2011 9:44 pm; edited 1 time in total |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Dec 18, 2011 9:37 pm Post subject: |
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After basics: | Code: | +----------------+----------------+----------------+
| 1 7 2 | 4 3 5 | 9 6 8 |
| 5 4 9 | 7 8 6 | 1 2 3 |
| 3 6 8 | 29 19 12 | 57 57 4 |
+----------------+----------------+----------------+
| 6 2 5 | 39 179 13 | 48 48 79 |
| 4 8 3 | 56 2 79 | 57 1 5679 |
| 9 1 7 | 568 45 48 | 2 3 56 |
+----------------+----------------+----------------+
| 2 3 1 | 58 6 4789 | 48 489 57 |
| 8 9 4 | 23 57 23 | 6 57 1 |
| 7 5 6 | 1 49 489 | 3 489 2 |
+----------------+----------------+----------------+ |
Keith |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Dec 18, 2011 10:21 pm Post subject: |
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| Quote: | | Basics (Locked Candidates, Locked Subsets, Fishes) solve the puzzle. |
JC, I don't think that basics are understood to include fishes around here, just subsets and locked candidates. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Dec 18, 2011 10:56 pm Post subject: |
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| Marty R. wrote: | | Quote: | | Basics (Locked Candidates, Locked Subsets, Fishes) solve the puzzle. |
JC, I don't think that basics are understood to include fishes around here, just subsets and locked candidates. |
Besides, there is no fish, so far as I can see.
Keith |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Dec 18, 2011 11:27 pm Post subject: |
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Skyscraper on 7: | Code: | +----------------+----------------+----------------+
| 1 7 2 | 4 3 5 | 9 6 8 |
| 5 4 9 | 7 8 6 | 1 2 3 |
| 3 6 8 | 29 19 12 | 57 57 4 |
+----------------+----------------+----------------+
| 6 2 5 | 39 179* 13 | 48 48 79* |
| 4 8 3 | 56 2 79* | 57 1 5679 |
| 9 1 7 | 568 45 48 | 2 3 56 |
+----------------+----------------+----------------+
| 2 3 1 | 58 6 4789*| 48 489 5-7 |
| 8 9 4 | 23 57 23 | 6 57 1 |
| 7 5 6 | 1 49 489 | 3 489 2 |
+----------------+----------------+----------------+ |
Keith |
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experts
Joined: 18 Dec 2011
Posts: 2
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| Posted: Mon Dec 19, 2011 3:45 pm Post subject: |
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Thanks all.
I have got the basics down, however am still finding it difficult to recognize the advanced techniques. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Dec 19, 2011 4:43 pm Post subject: |
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| experts wrote: | Thanks all.
I have got the basics down, however am still finding it difficult to recognize the advanced techniques. |
Just keep reading about the techniques on various sites and don't hesitate to ask questions or post your puzzle here. |
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