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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon Nov 09, 2009 5:57 pm Post subject: Puzzle NR 09/11/09 |
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| Code: | +-----------------------+
| 7 . . | 8 . . | . . . |
| . 5 . | . 9 4 | . . . |
| . . 4 | 7 1 3 | . . . |
|-------+-------+-------|
| 6 . 9 | 4 7 . | . 5 . |
| . 1 7 | 3 5 . | . . 9 |
| . 2 5 | . . 9 | . . 1 |
|-------+-------+-------|
| . . . | . . . | . . . |
| . . . | 5 . . | . 6 4 |
| . . . | . 4 7 | . 9 . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Mon Nov 09, 2009 9:43 pm Post subject: |
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| Code: | .------------------------.------------------------.------------------------.
| 7 39 123 | 8 6 5 | 12349 1234 23 |
| 138 5 1368 | 2 9 4 | 1378 1378 3678 |
| 28 69 4 | 7 1 3 | 59 28 56 |
:------------------------+------------------------+------------------------:
| 6 38 9 | 4 7 1 | 238 5 238 |
| 48 1 7 | 3 5 2 | 6 48 9 |
| 34 2 5 | 6 8 9 | 347 347 1 |
:------------------------+------------------------+------------------------:
| 12358 4 1238 | 9 23 6 | 123578 12378 23578 |
| 9 7 123 | 5 23 8 | 123 6 4 |
| 2358 368 2368 | 1 4 7 | 2358 9 2358 |
'------------------------'------------------------'------------------------' |
1... ALS[(3)r49c2 = (6)r9c2]r49c2 - (6)r3c2 = (6-8)r2c3 = (8)r23c1 - (8)r5c1 = (8)r5c8 - (8=2)r3c8 - (2=3)r1c9; r1c2 <> 3
2... (2)r3c8 = (2)r1c789 - (2)r1c3 = [x-wing:(2)r78c35]; r7c8 <> 2
3... kite on 1's ... (1)r8c7 = (1)r8c3 - (1)r7c1 = (1)r2c1; r2c7 <> 1
4... (3)r7c8 = (3-7)r6c7 = (7)r2c8 - (7=8)r2c7 - (8)r3c8 = (8)r3c1 - (8)r5c1 = (8-3)r4c2 = (3)r9c2; r9c7 <> 3
step 2 is also a finned x-wing in row 3 and 9 on candidate 2. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Nov 10, 2009 2:12 am Post subject: |
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| I couldn't find anything other than a couple of ERs and the obvious X-Wing on 8. A Medusa wrap was my only way out. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Nov 10, 2009 2:43 am Post subject: |
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| Marty R. wrote: | | I couldn't find anything other than a couple of ERs and the obvious X-Wing on 8. A Medusa wrap was my only way out. |
Unfortunately, most of the puzzles in my current set of NR puzzles have at least one XYZ-Wing. Starting with my next post, I'll filter out puzzles with XYZ-Wings and/or grouped single-digit patterns. This should (hopefully) result in more reasonable puzzles.
Note: My next set of NR puzzles was generated w/o XYZ-Wings, and I'll filter out any puzzles that need a grouped single-digit pattern.
Regards, Danny |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Nov 10, 2009 8:58 am Post subject: |
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| Marty R. wrote: | | I couldn't find anything other than a couple of ERs and the obvious X-Wing on 8. A Medusa wrap was my only way out. |
I used two xyz-wings 213, two x-wings 8, an er 2, and a w-wing 23
I could not get this one to break.  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Nov 10, 2009 1:28 pm Post subject: |
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| arkietech wrote: | I could not get this one to break.
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| Code: | r3 Naked Pair <> 28 [r3c279]
r35 X-Wing <> 8 [r279c1],[r27c8]
c1b9 Empty Rectangle (or Kite) <> 1 [r2c7]
<123> XYZ-Wing [r1c3]/[r1c9]+[r2c1] <> 3 [r1c2]
c29 X-Wing <> 8 [r49c7] -or-
r27 X-Wing <> 8 [r49c7]
r39 X-Wing (Sashimi) <> 2 [r7c8]
c8b3 Locked Candidate 2 <> 2 [r1c79]
<123> XYZ-Wing [r8c7]/[r4c7]+[r7c8] <> 3 [r79c7]
r9 b7 Locked Candidate 2 <> 3 [r7c13],[r8c3]
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In retrospect, I should never have posted this puzzle. My apologies!!! |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Nov 11, 2009 4:52 pm Post subject: |
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Danny,
I enjoyed this puzzle very much. It offered a variety of steps/solutions which I think is great; some VH moves and some more advanced moves. It would be boring if everyone had (essentially) the same solution.
My first step made the same deletion as Norm's first step, but he employed an ALS and I had a chain formed by extending a potential vertex:
(3=2)r1c9 - (2=8)r3c8 - (8)r5c8 = (8)r5c1 - (8=3)r4c2; r1c2<>3,
Next, I had two x-wings on 8: r35c18 & 4r9c29
Then a w-wing 23 in r1c9 & r4c7 which made three deletions plus a pincer transport made an addition key deletion
Then a UR 23 in r78c35 provides a pseudocell 18 in r78c3, which can be combined with the 138 in r2c3 to form a "Hidden Pair" or ALS condition. As an ALS: ALS[(1)r278c3 = (3)r2c3] - (3=1)r2c1; r1c3<>1 to complete the puzzle.
Ted  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Nov 11, 2009 6:28 pm Post subject: |
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I'm glad that everyone is finding their own solution!!!
I (usually) run a puzzle through my solver using techniques in various permutations. This gives me an idea if one or more steps are "necessary". It also gives me an idea if others will be able to find a distinct solution to call their own. |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Wed Nov 11, 2009 9:44 pm Post subject: |
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| daj95376 wrote: | | arkietech wrote: | I could not get this one to break.
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| Code: | r3 Naked Pair <> 28 [r3c279]
r35 X-Wing <> 8 [r279c1],[r27c8]
c1b9 Empty Rectangle (or Kite) <> 1 [r2c7]
<123> XYZ-Wing [r1c3]/[r1c9]+[r2c1] <> 3 [r1c2]
c29 X-Wing <> 8 [r49c7] -or-
r27 X-Wing <> 8 [r49c7]
r39 X-Wing (Sashimi) <> 2 [r7c8]
c8b3 Locked Candidate 2 <> 2 [r1c79]
<123> XYZ-Wing [r8c7]/[r4c7]+[r7c8] <> 3 [r79c7]
r9 b7 Locked Candidate 2 <> 3 [r7c13],[r8c3]
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In retrospect, I should never have posted this puzzle. My apologies!!! |
Whatever you mean, it is wonderful that some puzzles are hard.
Do we not, most, find different trails through the woods?
I rarely post my particular trail. I do enjoy it. |
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