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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Dec 27, 2009 9:29 am Post subject: Puzzle 09/12/27 (C) |
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I'm going to be away for a few days.
| Code: | +-----------------------+
| 8 . . | 6 3 5 | 4 . . |
| . . . | . . . | . . . |
| . . . | . 4 7 | . 3 . |
|-------+-------+-------|
| 3 . . | . 9 1 | 7 . . |
| 4 . 1 | 7 . . | . . 9 |
| 7 . 6 | 4 . 8 | . . 3 |
|-------+-------+-------|
| 1 . . | 3 . . | . . 8 |
| . . 8 | . . . | . 5 . |
| . . . | . 8 6 | 3 . 7 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Mon Dec 28, 2009 5:09 am Post subject: |
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Best I could find --so far--three steps: | Quote: | Remote pair 25
xy-wing 496
w-wing 69
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Mon Dec 28, 2009 8:35 pm Post subject: |
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here is a two stepper.
| Code: | .---------------------.---------------------.---------------------.
| 8 17 279 | 6 3 5 | 4 129 12 |
| 2569 4 3 | 289 1 29 | 2689 7 256 |
| 2569 16 259 | 289 4 7 | 12689 3 1256 |
:---------------------+---------------------+---------------------:
| 3 8 25 | 25 9 1 | 7 46 46 |
| 4 25 1 | 7 6 3 | 25 8 9 |
| 7 9 6 | 4 25 8 | 125 12 3 |
:---------------------+---------------------+---------------------:
| 1 67 24579 | 3 25 249 | 269 2469 8 |
| 269 3 8 | 129 7 249 | 1269 5 1246 |
| 259 25 2459 | 1259 8 6 | 3 1249 7 |
'---------------------'---------------------'---------------------' |
extended w-wing(25) pincers in r5c2 and r6c5, extended via the 5's in row 7.
r9c2 is not 5
leaves...
(9=6)r7c7 - (6)r7c2 = (6-1)r3c2 = (1)r1c2 - (1=2)r1c9 - (2=9)r1c8;
r79c8 <> 9
r23c7 <> 9
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Dec 29, 2009 8:57 pm Post subject: |
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| Same as Dan except my first step was in the form of a simple coloring chain on 5. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Dec 30, 2009 4:40 pm Post subject: |
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My first two steps were the same as Dan's, but then I used a hidden UR 49 which opened up a xy-wing -469 to complete the puzzle. I never got around to looking for other patterns.
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Sun Jan 03, 2010 6:28 pm Post subject: |
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| Code: | 2-Fish r4c5\c3b5 fm 110\011 <> 25 r7c3 Remote Pair
2-Fish r19\c38 f 200\020 <> 9 r7c3 extraneous
<49+6> XY-Wing r9c8/r4c8+r7c7 <> 6 r7c8
{ 42} -6r7c7 9r7c7 9r8c4 6r8c1 [ W-Wing ] <> 6 r7c2,r8c79 -or-
+--------------------------------------------------------------+
| 8 17 79 | 6 3 5 | 4 29 12 |
| 2569 4 3 | 289 1 29 | 689 7 56 |
| 2569 16 59 | 289 4 7 | 1689 3 156 |
|--------------------+--------------------+--------------------|
| 3 8 2 | 5 9 1 | 7 6 4 |
| 4 5 1 | 7 6 3 | 2 8 9 |
| 7 9 6 | 4 2 8 | 5 1 3 |
|--------------------+--------------------+--------------------|
| 1 67 479 | 3 5 29 | 69 249 8 |
| 69 3 8 | 29 7 4 | 169 5 126 |
| 59 2 459 | 1 8 6 | 3 49 7 |
+--------------------------------------------------------------+
# 42 eliminations remain
<15+6> XYZ-Wing r3c9/r2c9+r3c2 <> 6 r3c7
<24+9> XYZ-Wing r7c8/r7c6+r9c8 <> 9 r7c7
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