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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Thu Aug 20, 2009 3:44 am Post subject: Set XY_03 Puzzle 037 |
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The XYZ-Wing isn't needed to get around the XY-Chain, but my workaround is not something I'd normally find.
| Code: | +-----------------------+
| 9 . . | . . . | 4 6 . |
| . 1 . | . 9 . | 8 . . |
| . . . | . . . | . 9 5 |
|-------+-------+-------|
| . . . | . 6 . | . . 4 |
| . 6 . | 3 . . | . 7 9 |
| . . . | . . . | 6 3 . |
|-------+-------+-------|
| 4 8 . | . . 1 | . 5 . |
| 1 . 7 | . 5 6 | 9 4 . |
| . . 6 | 9 8 . | . . 7 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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strmckr
Joined: 18 Aug 2009
Posts: 64
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| Posted: Thu Aug 20, 2009 6:06 am Post subject: |
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how about after ss brings it to here: skip the xyz wing and...
| Code: | .-----------------.---------------.----------.
| 9 27@ 358 | 58 2-7 358 | 4 6 1 |
| 6-7 1 45@ | 46 9 57@ | 8 2 3 |
| 36 24@ 2348 | 46 1 238 | 7 9 5 |
:-----------------+---------------+----------:
| 37 279 23 | 15 6 279 | 15 8 4 |
| 258 6 124 | 3 24 258 | 15 7 9 |
| 58 4579 14 | 158 47 5789 | 6 3 2 |
:-----------------+---------------+----------:
| 4 8 9 | 7 3 1 | 2 5 6 |
| 1 3 7 | 2 5 6 | 9 4 8 |
| 25 25 6 | 9 8 4 | 3 1 7 |
'-----------------'---------------'----------'
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go with
wxyz wing aka:
Almost Locked Set XZ-Rule: A=r2c36 {457}, B=r13c2 {247}, X=4, Z=7 => r1c5,r2c1<>7
i found 3 more in the same band but this one does the most damage... |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Thu Aug 20, 2009 8:11 am Post subject: |
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| Code: | .---------------------.---------------------.---------------------.
| 9 *257 2358 | 58 2-7 *23578 | 4 6 1 |
| 567 1 45 | 46 9 *57 | 8 2 3 |
| 2368 24 2348 | 146 14 238 | 7 9 5 |
:---------------------+---------------------+---------------------:
| 237 U279 23 | 15 6 U279 | 15 8 4 |
| 258 6 12458 | 3 124 258 | 15 7 9 |
| 578 U4579 1458 | 1458 147 U5789 | 6 3 2 |
:---------------------+---------------------+---------------------:
| 4 8 9 | 7 3 1 | 2 5 6 |
| 1 3 7 | 2 5 6 | 9 4 8 |
| 25 25 6 | 9 8 4 | 3 1 7 |
'---------------------'---------------------'---------------------' |
interesting that this UR inference makes the same elimination as the wxyz-wing shown by strmckr
the 9's are locked into a x-wing in the U cells
a 7 is in each of the cells also.
UR79r46c26
notice that there is one other 7 in column 2 and a group of 7's in column 6.
1...UR79[(7)r1c2 = (7)r12c6]; r1c5 <> 7
2... xy-wing {2,4,5} removes 5 from r1c2 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Thu Aug 20, 2009 1:41 pm Post subject: |
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I started with a xy-wing 24-5 with pivot 24 in r3c2 that deletes 5 in r1c2.
Then another xy-wing -257 with pivot 57 in r2c6 and pseudocell 25 in box1 deletes the 2 in r1c2 to complete the puzzle.
I never got around to looking for a xyz-wing.
Ted |
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