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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sat Dec 06, 2008 7:09 am Post subject: Set F Puzzle 22 |
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Swordfish possible.
| Code: | +-----------------------+
| . . 3 | 4 . . | . . 1 |
| . . . | . 2 . | . 6 . |
| 8 . 9 | 5 . . | 4 2 . |
|-------+-------+-------|
| 3 . 8 | . . . | . 5 4 |
| . 2 . | . . . | 1 . 9 |
| . . . | . . . | . . . |
|-------+-------+-------|
| . . 2 | . 6 . | 7 . . |
| . 5 6 | 3 . . | . 4 . |
| 9 . . | 8 4 . | . . . |
+-----------------------+
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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: Sun Dec 07, 2008 12:37 am Post subject: |
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I used a w-wing <89> with a the hinge/group link as noted by Norm in another post, plus a type 3 UR <19> to finish off this puzzle.
The first move was the difficult one for me to locate.
Ted |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Tue Dec 09, 2008 9:04 pm Post subject: |
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| tlanglet wrote: | I used a w-wing <89> with a the hinge/group link as noted by Norm in another post, plus a type 3 UR <19> to finish off this puzzle.
The first move was the difficult one for me to locate.
Ted |
Ted,
if this is the w-wing to which you refer
| Code: | .---------------------.---------------------.---------------------.
| 2 67 3 | 4 789 6789 | 5 #89 1 |
| 57 147 145 | 179 2 13789 |38-9 6 378 |
| 8 167 9 | 5 137 1367 | 4 2 37 |
:---------------------+---------------------+---------------------:
| 3 179 8 | 26 179 179 | 26 5 4 |
| 567 2 45 | 67 358 348 | 1 *378 9 |
| 567 1479 145 | 12679 358 348 |*38 *378 26 |
:---------------------+---------------------+---------------------:
| 4 8 2 | 19 6 159 | 7 39 35 |
| 1 5 6 | 3 79 279 |#89 4 28 |
| 9 3 7 | 8 4 25 | 26 1 256 |
'---------------------'---------------------'---------------------' |
then the elimination of that 9 reduces the puzzle to singles. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Dec 10, 2008 3:55 am Post subject: |
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Norm, yes that is the W-wing I used. Sometimes I do not do alot of basic clean-up after each move, especially if I notice another step. I suspect that is what happen in this instance.
Thanks very much for your input and also for pointing out in detail this hinge/group link technique.
Ted |
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