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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Dec 17, 2008 6:53 am Post subject: Set G Puzzle 35 |
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| Code: | +-----------------------+
| . . . | 8 . . | 7 . 9 |
| . 9 . | . 5 . | . 2 6 |
| . . 1 | . . . | . . . |
|-------+-------+-------|
| 6 . . | . . . | 3 . . |
| . 5 . | . 3 . | . 8 . |
| . . . | . . 8 | 9 . 5 |
|-------+-------+-------|
| 3 . . | 9 . 5 | 4 . . |
| . 6 . | . 8 . | . . 7 |
| 4 7 . | . . 3 | . 9 8 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Dec 17, 2008 3:16 pm Post subject: |
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Yet another "still going" type of puzzle! Never had to resort to more involved techniques but repeatedly had to review the entire puzzle to locate a deletion. My kind of puzzle.
My solution: | Quote: | | multi-coloring <4>, xy-wing<245>, coloring <4>, xy-wing<278> plus a transport, kite <7> and finally a BUG+1 |
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Dec 17, 2008 6:30 pm Post subject: |
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| tlanglet wrote: | | Yet another "still going" type of puzzle! Never had to resort to more involved techniques but repeatedly had to review the entire puzzle to locate a deletion. My kind of puzzle. |
This is how I'd hoped most people would find solutions to my puzzles. However, since I'm unable to check for every possible alternate solution, many find URs and Wings that I didn't know was present. This is okay though because I then use their solutions as a learning aid for myself.
I'm relieved at all of the positive responses. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Dec 17, 2008 8:55 pm Post subject: |
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| I've used a plethora of x-wings, xy-wings and a UR. I'm almost there with just one triple left <127> in R5C6. I always thought that when there was one triple left, there was always a Bug+1 - that is the xyz had to see the xy and yz. This triple doesn't. (and I'm stuck) |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Wed Dec 17, 2008 9:48 pm Post subject: |
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Hail Craig and all other sudoku addicts!
I'm back from a very long (luckily, we avoided Bangkok and went to S'pore instead  ) and very unexpected (it was like here tonight gone for three weeks tomorrow) trip, and what do I find: a comrade in distress ...
Could it be that this is your position?
| Code: |
+--------------------------+--------------------------+--------------------------+
| 5 3 6 | 8 12 12 | 7 4 9 |
| 8 9 47 | 3 5 47 | 1 2 6 |
| 27 24 1 | 47 9 6 | 8 5 3 |
+--------------------------+--------------------------+--------------------------+
| 6 1 8 | 5 24 9 | 3 7 24 |
| 9 5 47 | 12 3 127 | 6 8 24 |
| 27 24 3 | 67 46 8 | 9 1 5 |
+--------------------------+--------------------------+--------------------------+
| 3 8 2 | 9 7 5 | 4 6 1 |
| 1 6 9 | 24 8 24 | 5 3 7 |
| 4 7 5 | 16 16 3 | 2 9 8 |
+--------------------------+--------------------------+--------------------------+
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At least that's what I came up with after don't know how many coloring and wing steps.
The BUG+1 says that 2 in r5c6 is the odd one out so r5c6=2.
(there is a w-wing that will remove 2 from r4c5 and solve the puzzle, too, I think, but I like the clean BUG+1 solution a lot. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Dec 17, 2008 10:14 pm Post subject: |
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Nataraj: Glad to see you back home. Austria's a nice place. ("Put another shrimp on the Barbie Mate").
However - my point was that I thought for all Bug+1s the triple 127 had to see both 12 and a 27 or a 17 and a 21 or a 17 and a 27. This one doesn't so how do you know what the odd one out is.
Cheers |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Dec 17, 2008 10:23 pm Post subject: |
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| cgordon wrote: | Nataraj: Glad to see you back home. Austria's a nice place. ("Put another shrimp on the Barbie Mate").
However - my point was that I thought for all Bug+1s the triple 127 had to see both 12 and a 27 or a 17 and a 21 or a 17 and a 27. This one doesn't so how do you know what the odd one out is.
Cheers |
I'm not from Austria, but...
The 2 is present three times in the box, column and row. If you removed it you'd have the DP of all bivalue cells, so the 2 has to be the one to kill the DP. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Dec 17, 2008 11:01 pm Post subject: |
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| Gotcha! It's nothing to do with xyz - just x seeing two other x's. As you can see I am a man of rote not logic. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Dec 17, 2008 11:15 pm Post subject: |
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| Just for laughs, it also solves with a W-Wing on the 12 cells in r1c6 and r5c4. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Dec 17, 2008 11:24 pm Post subject: |
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| cgordon wrote: | | Nataraj: Glad to see you back home. Austria's a nice place. ("Put another shrimp on the Barbie Mate"). |
Craig: I have a feeling that you have Austria and Australia confused. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Dec 17, 2008 11:28 pm Post subject: |
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| Marty R. wrote: | | Just for laughs, it also solves with a W-Wing on the 12 cells in r1c6 and r5c4. |
You folks are deadly with W-Wings, M-Wings, URs, and DPs. I post a puzzle that I think will make you work a bit, and you slip in one of these techniques and blow a hole in the difficulty level of my puzzle.  |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Wed Dec 17, 2008 11:39 pm Post subject: |
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| daj95376 wrote: | | Marty R. wrote: | | Just for laughs, it also solves with a W-Wing on the 12 cells in r1c6 and r5c4. |
You folks are deadly with W-Wings, M-Wings, URs, and DPs. I post a puzzle that I think will make you work a bit, and you slip in one of these techniques and blow a hole in the difficulty level of my puzzle. |
wasn't Marty making a reference to the grid that Nataraj posted and not the grid after basics?? |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Dec 18, 2008 1:11 am Post subject: |
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| storm_norm wrote: | | daj95376 wrote: | | Marty R. wrote: | | Just for laughs, it also solves with a W-Wing on the 12 cells in r1c6 and r5c4. |
You folks are deadly with W-Wings, M-Wings, URs, and DPs. I post a puzzle that I think will make you work a bit, and you slip in one of these techniques and blow a hole in the difficulty level of my puzzle. |
wasn't Marty making a reference to the grid that Nataraj posted and not the grid after basics?? |
Yes, I was. I should have written that the W-Wing was just an alternative to the BUG+1. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Thu Dec 18, 2008 2:48 am Post subject: |
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And I should have made it clearer that I was making a general statement.  |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Thu Dec 18, 2008 2:33 pm Post subject: |
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| Quote: | | Craig: I have a feeling that you have Austria and Australia confused. |
Sorry: It was a flippant reference to a line from a brilliant movie with Jim Carey when he is trying to pick up a lady at a bus stop.
Jim Carey: That's a lovely accent you have. New Jersey?
Lady at bus stop: Austria.
Jim Carey: Austria! Well, then. G'day mate! Let's put another shrimp on the barbie.
http://www.youtube.com/watch?v=9TAkbtaqN0o |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Dec 19, 2008 2:02 am Post subject: |
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The ending is a BUG+1: | Code: | +-------------+-------------+-------------+
| 5 3 6 | 8 12@ 12@ | 7 4 9 |
| 8 9 47C | 3 5 47B | 1 2 6 |
| 27 2-4 1 | 47 9 6 | 8 5 3 |
+-------------+-------------+-------------+
| 6 1 8 | 5 24a 9 | 3 7 24 |
| 9 5 47 | 12# 3 127 | 6 8 24 |
| 27 24c 3 | 67 46b 8 | 9 1 5 |
+-------------+-------------+-------------+
| 3 8 2 | 9 7 5 | 4 6 1 |
| 1 6 9 | 24# 8 24A | 5 3 7 |
| 4 7 5 | 16 16 3 | 2 9 8 |
+-------------+-------------+-------------+ |
But, A and a are a W-wing due to either of the links @ or #. Transporting (coloring) both the pincers abc, ABC, takes out <4> in R3C2.
(If you do not use a BUG+1, the solution is often not just a simple XY-wing or the like. Except, I have a contention that Medusa coloring will always solve a BUG+1.)
Keith |
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