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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Dec 11, 2009 4:24 pm Post subject: Puzzle XY 09/12/11 (A) |
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| Code: | +-----------------------+
| 6 . . | . . . | . 5 . |
| . 8 . | . . . | 3 6 . |
| . . 5 | . . 6 | 2 9 8 |
|-------+-------+-------|
| . . . | 5 . . | . . . |
| . . . | . 8 . | . 3 . |
| . . 7 | . . 9 | 8 1 2 |
|-------+-------+-------|
| . 2 4 | . . 5 | . . 9 |
| 9 5 6 | . 2 8 | . 4 . |
| . . 3 | . . 4 | 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: Sat Dec 12, 2009 6:02 am Post subject: |
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| Two ERs, two Hidden URs, XY-Wing with pincer transport, and another XY-Wing. I was staring at a brick wall for quite some time when I noticed a triple in box 1. I don't know if failure to spot that triple would have precluded some of the other moves. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sat Dec 12, 2009 6:57 am Post subject: |
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| Marty R. wrote: | | I don't know if failure to spot that triple would have precluded some of the other moves. |
Although I found extraneous steps in my solver's solution, I believe the few basics were all important to exposing the final advanced steps. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Dec 12, 2009 8:24 am Post subject: |
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continously nice!  | Code: | *-----------------------------------------------------------*
| 6 139 129 | 8 1379 1237 | 4 5 17 |
| 247 8 129 | 2479 5 127 | 3 6 17 |
| 347 134 5 | 347 1347 6 | 2 9 8 |
|-------------------+-------------------+-------------------|
| 234 1346 8 | 5 1346 123 | 9 7 46 |
| 24 1469 129 | 2467 8 127 | 5 3 46 |
| 5 346 7 | 346 346 9 | 8 1 2 |
|-------------------+-------------------+-------------------|
| 1 2 4 | 37 37 5 | 6 8 9 |
| 9 5 6 | 1 2 8 | 7 4 3 |
| 8 7 3 | 69 69 4 | 1 2 5 |
*-----------------------------------------------------------*
(7-4)r2c1=(4-2)r2c4=(2)r5c4-(2)r4c6=(2-3)r4c1=(3-7)r3c1=(7-4)r2c1
=> r2c1,r5c6<>2, r34c1<>4, r2c4<>7, r2c4<>9
singles remain |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Dec 12, 2009 7:59 pm Post subject: |
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Four steps:
skyscraper on 2
finned swordfish on 3,
xy-wing 2-47 with pincer transport,
xy-wing 24-7 with pincer transport.
I agree with Marty that this puzzle required basic cleanup between advanced moves.
Ted |
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