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daj95376
Joined: 23 Aug 2008 Posts: 3854
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Posted: Fri Feb 05, 2010 7:36 am Post subject: Puzzle 10/02/05 (B) |
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Code: | +-----------------------+
| 2 4 . | 8 . 7 | 1 . . |
| 6 . . | 9 5 . | . 3 . |
| . . 9 | . . . | . . 7 |
|-------+-------+-------|
| 4 8 . | 1 . . | 3 . . |
| . 1 . | . 4 . | . 9 . |
| 9 . . | . . 8 | . . . |
|-------+-------+-------|
| 8 . . | 5 . . | 6 1 . |
| . 6 . | . 1 . | 7 8 . |
| . . 1 | . . . | . . 3 |
+-----------------------+
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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: Fri Feb 05, 2010 7:11 pm Post subject: |
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My first "2 and 3/8" steps did the trick.
AIC found, as usual for me, looking for xy-wings:
(4=2)r8c3 - (2=5)r9c2 - r9c1 = r5c1 - (5=2)r5c7 - r46c8 = r9c8 - (2=4)r7c9; r7c3<>4.
This sets up a finned xy-wing with the vertex and fin both being in r4c3.
If the xy-wing 25-7 is true: vertex 25 in r4c3 with pincers 57 in r5c1 and 27 in r7c3 delete 7 in r56c3 and r9c1.
If fin is true: only the 7 in r56c3 is deleted.
Then, transporting (7)r7c3 - r7c5 = (7)r6c5 deletes 7 in r5c4 to complete the puzzle.
Ted
PS: Please note that Marty suggested that transports count as a "3/8" step. |
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arkietech
Joined: 31 Jul 2008 Posts: 1834 Location: Northwest Arkansas USA
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Posted: Fri Feb 05, 2010 7:53 pm Post subject: |
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Best I could do was 4 steps:
xy-wing 527
x-wing 2
kite 3
kite 2
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daj95376
Joined: 23 Aug 2008 Posts: 3854
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Posted: Fri Feb 05, 2010 9:29 pm Post subject: |
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arkietech wrote: | Best I could do was 4 steps:
xy-wing 527
x-wing 2
kite 3
kite 2
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Why the sad face? I see a very nice solution using VH and VH+ techniques.
Regards, Danny |
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Wendy W
Joined: 04 Feb 2008 Posts: 144
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Posted: Sat Feb 06, 2010 12:52 am Post subject: |
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Three steps for me:
XY 257
Skyscraper 2 (which knocked out four "2s" -- sweet!)
X 2 |
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arkietech
Joined: 31 Jul 2008 Posts: 1834 Location: Northwest Arkansas USA
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Posted: Sat Feb 06, 2010 2:20 am Post subject: |
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Wendy W wrote: | Skyscraper 2 (which knocked out four "2s" -- sweet!) |
Missing that one makes me sad
Nice find Wendy! |
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Sat Feb 06, 2010 2:20 am Post subject: |
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ERs (2,3)
W (24)
Finned X-Wing (2)
XY (257)
W (25) |
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Wendy W
Joined: 04 Feb 2008 Posts: 144
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Posted: Sat Feb 06, 2010 3:35 pm Post subject: |
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Thanks, Dan! |
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