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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon Feb 22, 2010 8:54 pm Post subject: Puzzle 10/02/00 (B) |
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| Code: | +-----------------------+
| 8 . . | . . 5 | . . . |
| . 7 1 | . 8 . | 3 5 . |
| . 3 . | . 1 . | . . . |
|-------+-------+-------|
| . . . | 5 . . | . 7 . |
| . 1 7 | . . 4 | . . . |
| 9 . . | . 6 . | 4 3 . |
|-------+-------+-------|
| . 5 . | . . 6 | . 9 3 |
| . 9 . | 3 . 8 | 7 6 . |
| . . . | . . . | 1 . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Feb 23, 2010 5:20 am Post subject: |
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One step.
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Feb 24, 2010 1:49 am Post subject: |
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Five steps.
Hidden UR45 in r89c59,
Type 1 UR29 in r29c46,
xy-wing 2-46 with vertex in r1c7 with pseudocell pincer24 plus transport,
w-wing 46 in r1c2 and r4c1,
and finally I finished the puzzle with the move used by Marty to complete the puzzle in one step.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Feb 24, 2010 5:11 am Post subject: |
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| Ted, I tried it a second time and got the same result. |
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strmckr
Joined: 18 Aug 2009
Posts: 64
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| Posted: Wed Feb 24, 2010 9:44 am Post subject: |
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perhaps u mean
XYZ-Wing: 7/2/4 in r7c15,r8c3 => r7c3<>4
other wise its all basics.. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Feb 24, 2010 11:41 am Post subject: |
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| strmckr wrote: |
perhaps u mean
XYZ-Wing: 7/2/4 in r7c15,r8c3 => r7c3<>4
other wise its all basics.. |
Marty's XYZ-Wing works, too.
| Code: | after basics
+--------------------------------------------------------------+
| 8 46 2469 | 2469 3 5 | 26 1 7 |
| 246 7 1 | 2469 8 29 | 3 5 249 |
| 5 3 2469 | 2469 1 7 | 268 48 249 |
|--------------------+--------------------+--------------------|
| 46 468 468 | 5 2 3 | 9 7 1 |
| 3 1 7 | 8 9 4 | 5 2 6 |
| 9 2 5 | 7 6 1 | 4 3 8 |
|--------------------+--------------------+--------------------|
| 247 5 248 | 1 47 6 | 28 9 3 |
| 1 9 24 | 3 45 8 | 7 6 245 |
| 467 468 3 | 29 457 29 | 1 48 45 |
+--------------------------------------------------------------+
# 52 eliminations remain
<27+4> XYZ-Wing r7c1/r7c5+r8c3 <> 4 r7c3 -or-
<48+2> XYZ-Wing r7c3/r7c7+r8c3 <> 2 r7c1
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BTW: leave it up to a puzzle where I messed up the date to get a lot of discussion.  |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Feb 24, 2010 2:21 pm Post subject: |
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| Marty R. wrote: | | Ted, I tried it a second time and got the same result. |
Marty, please do not misunderstand my comment. I was simply bemoaning the fact that I used four steps before I found your one step solution.
It is interesting that on the one occasion I looked for xyz-wing immediately after basics, I also found a one-stepper. Maybe we are onto something here?
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Feb 24, 2010 4:46 pm Post subject: |
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| Quote: | | Marty, please do not misunderstand my comment. I was simply bemoaning the fact that I used four steps before I found your one step solution. |
When I see a solution that took more steps then mine I like to double check because I've been burned too often, such as posting that I solved a puzzle with all basics, only to discover that I made a lucky mistake.
I considered the possibility that you were questioning my one-stepper, but I was going to take a second shot at it regardless, since at the time there was no confirmation of my solution. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Feb 24, 2010 5:27 pm Post subject: |
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(B)-category puzzles often have an XYZ-Wing according to my solver. I don't check to see if the other steps are necessary. I don't check to see if other steps can get around it. For sure, extensions and transports will probably get around it.
Regards, Danny |
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strmckr
Joined: 18 Aug 2009
Posts: 64
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| Posted: Fri Feb 26, 2010 1:27 am Post subject: |
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| Quote: | | Marty's XYZ-Wing works, too. |
i should have looked for more then 1 (or checked via program)
my bad,
strmckr.
(even worse its right next to it and shares a cell...)
for more fun join the two and make a loop  |
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oaxen
Joined: 10 Jul 2006
Posts: 96
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| Posted: Fri Feb 26, 2010 10:02 pm Post subject: How many steps |
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| Today again a one stepper, but dear Danny, lately many of your puzzles were not se easy to solve with the simplified Oaxen Technique. I have had a lot of fun! |
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