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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Dec 06, 2009 10:12 pm Post subject: Puzzle VH 09/12/06 |
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A VH puzzle for a change of pace. No ER/Kite/Skyscraper/(Fish in general) needed.
| Code: | +-----------------------+
| 5 . . | . . . | . . 8 |
| . . . | 8 . . | . . . |
| . . 8 | . . 5 | . 7 4 |
|-------+-------+-------|
| . 7 . | . 2 . | . . . |
| . . . | 7 9 4 | . . 5 |
| . . 5 | . 8 . | 4 1 . |
|-------+-------+-------|
| . . . | . . 7 | 8 . . |
| . . 7 | . . 3 | . 6 . |
| 2 . 9 | . 4 . | . . 3 |
+-----------------------+
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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 Dec 08, 2009 11:57 pm Post subject: |
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I didn't use any of the techniques you said weren't needed. I do wonder if I overlooked something in that maze of 1s, 3s and 6s.
Type 1 UR (29)
XY-Wing (136) with pincer transport
XY-Wing Chain (36-16-16-16-13)
Above with pincer transport
XY-Wing (361) |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Dec 09, 2009 4:38 am Post subject: |
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| Marty R. wrote: | I didn't use any of the techniques you said weren't needed. I do wonder if I overlooked something in that maze of 1s, 3s and 6s.
Type 1 UR (29)
XY-Wing (136) with pincer transport
XY-Wing Chain (36-16-16-16-13)
Above with pincer transport
XY-Wing (361) |
Wow!!! This puzzle was suppose to be a respite from my previously difficult puzzles.
| Code: | c6b2 Locked Pair <> 29 r3c4
c8b3 Locked Pair <> 39 r1c7,r2c9
c4 Naked Pair <> 16 r78c4
b7 Naked Triple <> 136 r7c2,r8c12
r8 Naked Triple <> 129 r8c125
r7 Naked Triple <> 136 r7c9
r78c49 <29> UR Type 1 <> 29 r8c9
r3 b2 Locked Candidate 1 <> 6 r3c1
<36+1> XY-Wing r1c2/r3c1+r9c2 <> 1 r2c2,r7c1
r27 X-Wing <> 1 r3c5,r5c3
r5 Naked Pair <> 36 r5c12
c2b1 Locked Candidate 2 <> 3 r3c1,r12c3
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Dec 09, 2009 4:52 am Post subject: |
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| I didn't think it was particularly difficult. I'd have solved it with fewer steps, or so it looks from your diagram, had I used the X-Wing. Call it a habit, an idiosyncrasy, or whatever, but I hate looking for X-Wings and do so as a last resort, so if they're part of a solution, I'll usually need more steps. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Dec 09, 2009 10:33 am Post subject: |
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| Marty R. wrote: | | I didn't think it was particularly difficult. I'd have solved it with fewer steps, or so it looks from your diagram, had I used the X-Wing. Call it a habit, an idiosyncrasy, or whatever, but I hate looking for X-Wings and do so as a last resort, so if they're part of a solution, I'll usually need more steps. |
Hello Marty,
Thanks for the update. I was afraid that the limited selection at each step made the puzzle appear harder than I'd intended. As long as you're having fun finding a solution, that's the most important thing to me.
Regards, Danny |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Dec 11, 2009 3:01 pm Post subject: |
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I also started with the Type 1 UR 29, then an AIC found by extending the vertex of a potential xy-wing 1-36, and then a real xy-wing -136.
I never got around to looking for single digit patterns.
Ted |
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