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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Wed Dec 29, 2010 12:23 am Post subject: Another Vanhegan extreme |
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I found this a little more difficult than the other one. It's puzzle 6-1518140, rated 2.2.0.2.1.
After four moves which barely made a dent, I'm stuck here:
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+-------------+-------------+-------------+
| 2 68 34 | 1 7 35 | 9 568 456 |
| 68 1 5 | 4 2 9 | 68 3 7 |
| 34 9 7 | 35 6 8 | 1 2 45 |
+-------------+-------------+-------------+
| 9 56 1 | 56 8 7 | 3 4 2 |
| 34567 37 34 | 2 49 1 | 68 5689 569 |
| 456 2 8 | 3569 349 35 | 7 569 1 |
+-------------+-------------+-------------+
| 38 38 2 | 7 1 4 | 5 69 69 |
| 1 4 9 | 8 5 6 | 2 7 3 |
| 57 57 6 | 39 39 2 | 4 1 8 |
+-------------+-------------+-------------+
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Play this puzzle online at the Daily Sudoku site |
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daj95376
Joined: 23 Aug 2008 Posts: 3854
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Posted: Wed Dec 29, 2010 4:43 am Post subject: Re: Another Vanhegan extreme |
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Marty R. wrote: | After four moves which barely made a dent, ...
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I'm guessing that one of your moved included r5c2<>5. Try it w/o that move. |
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Wed Dec 29, 2010 5:57 am Post subject: |
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Quote: | I'm guessing that one of your moved included r5c2<>5. Try it w/o that move. |
I think you're right. One of the moves was a Hidden UR on 57 and I think I took a 5 out of r5c2 instead of r5c1.
I'll see what happens when I play with it tomorrow.
Thanks. |
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peterj
Joined: 26 Mar 2010 Posts: 974 Location: London, UK
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Posted: Wed Dec 29, 2010 9:06 am Post subject: |
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Yes, posting just the givens suggests that there might have been a Type 4 UR there initially?
This vaguely w-wing like chain finishes the posted grid...
Quote: | (3=5)r3c4-(5=6)r4c4 - r4c2=r1c2 - (6=8)r2c1-(8=3)r7c1 ; r3c1<>3 |
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Wed Dec 29, 2010 1:35 pm Post subject: |
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After I corrected my error with the 57 Hidden, I played it as a Type 4. That allowed Multi-coloring; r6c1<>5, which set up locked 5s in box 5, finishing the puzzle. |
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tlanglet
Joined: 17 Oct 2007 Posts: 2468 Location: Northern California Foothills
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Posted: Thu Dec 30, 2010 2:46 pm Post subject: |
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Another chain also does the trick..........
(3=7)r5c2-(7=5)r9c2-r4c2=r4c4-(5=3)r6c6-r1c6=r1c3; r5c3<>3=4
Ted |
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