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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Oct 27, 2010 11:16 pm Post subject: Puzzle 10/10/28: C XY |
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| Code: | +-----------------------+
| . 8 . | . . . | 7 . . |
| 2 . 7 | 8 . . | 5 . 3 |
| . 6 . | . . . | . . 1 |
|-------+-------+-------|
| . 5 . | 2 . . | 3 . . |
| . . . | . 9 . | . 2 . |
| . . . | . . 8 | 6 . 9 |
|-------+-------+-------|
| 5 9 . | 7 . 1 | . 3 . |
| . . . | . 8 . | 1 . . |
| . 3 6 | . . 5 | . . 7 |
+-----------------------+
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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: Thu Oct 28, 2010 1:13 am Post subject: |
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A fun puzzle.......
Type 1 UR(89)r39c78; r3c8=4
AXY-wing 1-47 vertex (17)r5c2 pincers (14)r2c2 & (47)r6c1 with fin (3)r6c1
[xy-wing(147)=(3)r6c1]-(35=1)r6c54-r1c4=r2c5-(1=4)r2c2; r13c1,r6=2<>4
This brings us to the code
| Code: | *-----------------------------------------------------------*
|*39 8 14 | 156 35 @*3469 | 7 @69 2 |
| 2 14 7 | 8 14 @69 | 5 @69 3 |
|*39 6 5 |*39 7 2 | 8 4 1 |
|-------------------+-------------------+-------------------|
| 6 5 9 | 2 14 47 | 3 17 8 |
| 8 17 13 | 16 9 367 | 4 2 5 |
| 47 127 1234 | 15 35 8 | 6 17 9 |
|-------------------+-------------------+-------------------|
| 5 9 8 | 7 6 1 | 2 3 4 |
| 47 247 24 |*39 8 *39 | 1 5 6 |
| 1 3 6 | 4 2 5 | 9 8 7 |
*-----------------------------------------------------------* |
Notice the overlapping AURs (39)r138c146 marked * and AUR(69)r12c68 marked @. Both are a Type 1 pattern with provide the deletion r1c6<>39 and r1c6<>69 which makes r1c6=4 to complete the puzzle.
Ted |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Thu Oct 28, 2010 2:29 pm Post subject: |
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A one step solution using a standard pattern with extension....
| Quote: | w-wing (17)r5c2,r6c8 SL (1)r2c25,r24c5,r4c58; r6c2<>7
plus transport (7)r5c2-r5c6=(7)r4c6; r4c7<>7
Note that the initial deletion in r6c3 is not fruitful, but the extension to make r4c7<>7 is a one stepper.......
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Ted |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Thu Oct 28, 2010 7:38 pm Post subject: |
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Wing style... (again, sorry!)
| Quote: | | m-wing-like(47) "pseudocell" ; (4=1)r2c2-(1=7)r5c2 - r5c6=(7-4)r4c6=r4c5 ; r2c5<>4 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Oct 29, 2010 9:56 pm Post subject: |
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| I used Ted's pair of 17s as a flightless M-Wing with transport; r4c5<>1. |
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