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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon Mar 08, 2010 3:10 am Post subject: Puzzle 10/03/07 ___ BBDB as VH+ puzzle |
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| Code: | +-----------------------+
| 8 1 . | 3 7 . | . . 2 |
| 3 . . | . . 1 | 7 . . |
| . . 7 | . . . | . . . |
|-------+-------+-------|
| 7 . . | . . 6 | 5 . . |
| 5 . . | . 9 . | 2 . . |
| . 9 . | 5 . 4 | . . . |
|-------+-------+-------|
| . 4 . | 7 2 . | 1 8 . |
| . . . | . . . | 4 . 5 |
| 2 . . | . . . | . 9 . |
+-----------------------+
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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: Tue Mar 09, 2010 3:12 pm Post subject: |
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Well, I never hit the sweet spot using VH+ steps on this puzzle; it took me a total of ten moves! It was fun working it given all the moves that seemed possible but they never were overly fruitful.
I used several x-wings, Type 1 UR, w-wings, xy-wings, a kite and one coloring step.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Mar 09, 2010 5:48 pm Post subject: |
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Heh heh, once again I lose the number-of-moves competition. This was a 12-stepper. There was the usual assortment of commonly used moves, plus three XY-Chains, which Ted didn't mention.
As a BBDB, it was very aptly named. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Mar 09, 2010 7:22 pm Post subject: |
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Yes, my solver's solution showed a succession of steps that were not impressive individually, but the cumulative effect was impressive. The UR Type 1 in the middle of the solution was the closest thing to a "surprise" that I saw.
Thanks Marty and Ted for battling your way through the puzzle!
Regards, Danny |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Mar 09, 2010 8:18 pm Post subject: |
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| Marty R. wrote: | Heh heh, once again I lose the number-of-moves competition. This was a 12-stepper. There was the usual assortment of commonly used moves, plus three XY-Chains, which Ted didn't mention.
As a BBDB, it was very aptly named. |
Marty, since this was posted as a VH+ puzzle I did not look for chains.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Mar 09, 2010 8:37 pm Post subject: |
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Marty, since this was posted as a VH+ puzzle I did not look for chains. |
Ted, I generally don't try to include/exclude any particular moves. I just take each puzzle and try to solve it as best I can. Which, by the way, is not meant to be critical of anyone who chooses to use the moves associated with the puzzle's rating. |
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oaxen
Joined: 10 Jul 2006
Posts: 96
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| Posted: Wed Mar 10, 2010 4:41 pm Post subject: |
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A thread starting with "5" in r1c6 makes it a one stepper.
A "5" in r1c3 shows after a few steps to be impossible. |
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