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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Feb 26, 2010 10:47 pm Post subject: Puzzle 10/02/26 (C) |
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| Code: | +-----------------------+
| 8 . . | . 3 9 | 5 . . |
| . . . | . 2 . | . . . |
| . . . | . . 4 | . 8 . |
|-------+-------+-------|
| . . . | . . 8 | 6 7 . |
| 6 8 . | . 5 . | . . . |
| 3 . 2 | 4 . 7 | 8 . 1 |
|-------+-------+-------|
| 9 . . | 3 . 2 | . . . |
| . . 8 | 9 . . | . . 4 |
| . . . | . . 5 | . 2 . |
+-----------------------+
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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: Sat Feb 27, 2010 2:55 pm Post subject: |
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Two steps
| Quote: | (4=1)r1c8 - ALS1234[(1)r23c7 = (3)r23c7]r235c7 - (3=7)r8c7 - (7=1)r7c7 - (1=6)r7c8 - (6=4)r7c3; r1c3<>4.
ALS A 1234 in r235c7,
ALS B 14 in r1c8
shared exclusive = 1
shared common = 4
r5c8<>4
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Ted |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Feb 27, 2010 7:30 pm Post subject: |
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I used four steps intially
xy-wing 146
w-wing 16 and 17 setting up another
w-wing 16
Then I found a two steps solution using an AIC | Code: |
xy-wing 146
*-----------------------------------------------------------------------------*
| 8 12467 16 | 67 3 9 | 5 14 267 |
| 1457 134567 134569 | 8 2 16 | 134 1349 679 |
| 127 12367 1369 | 5 17 4 | 123 8 2679 |
|-------------------------+-------------------------+-------------------------|
| 145 145 145 | 2 9 8 | 6 7 3 |
| 6 8 7 | 1 5 3 | 24 49 29 |
| 3 9 2 | 4 6 7 | 8 5 1 |
|-------------------------+-------------------------+-------------------------|
| 9 467 46 | 3 8 2 | 17 16 5 |
| 25 25 8 | 9 17 16 | 37 36 4 |
| 17 1367 136 | 67 4 5 | 9 2 8 |
*-----------------------------------------------------------------------------*
(4=1)r1c8 - (1=6)r1c3 - r1c4 = r9c4 - r8c6 = (6-3)r8c8 = (3-9)r2c8 = (9-4)r5c8 = r5c7; r2c7,r5c8<>4
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Feb 27, 2010 11:17 pm Post subject: |
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| I used two XY-Wings, 164 and 671. |
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