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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Aug 24, 2010 4:44 am Post subject: Puzzle 10/08/24: C |
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| Code: | +-----------------------+
| 9 . . | . 5 . | . 3 4 |
| . 7 . | 9 . 4 | . 1 . |
| . . 1 | 8 . . | . 9 . |
|-------+-------+-------|
| . 2 7 | . . 9 | . . . |
| 8 . . | . . . | . . . |
| . 3 . | 1 . 8 | . . 5 |
|-------+-------+-------|
| . . . | . . . | 3 . . |
| 7 8 2 | 4 . . | . . . |
| . . . | . . 5 | . . 8 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Tue Aug 24, 2010 7:21 am Post subject: |
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Two steps... (one I don't normally spot!)
| Quote: | 6-cell DP(19) ; r7c2<>19=5
xy-wing(26-7) r5c6 ; r3c9<>7 |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Tue Aug 24, 2010 8:27 am Post subject: |
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| Quote: | To avoid DP(19)B789 : r7c2=2
Kite on 7 : (7)C4B8 : => r5c6<>7
XY Wing Style from 6R3 : (26)R5C6 6R3 7C9 : => r5c9<>2 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Aug 24, 2010 4:09 pm Post subject: |
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Two steps...........
| Quote: | Type 1 6-cell ADP (19)r789c259; r7c2=5
Flightless xy-wing -267 vertex (67)r3c6 plus transport (2)r1c4-r2c5=(2)r2c9; r5c9<>2 |
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Aug 24, 2010 4:49 pm Post subject: |
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| Interesting. My solver doesn't find DP other than URs, so I find it interesting that everyone worked from a DP on this puzzle. |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Tue Aug 24, 2010 5:20 pm Post subject: |
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| Danny, I rarely see these things but even for me it was sitting there in almost splendid isolation down at the bottom of the grid! |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Aug 24, 2010 6:01 pm Post subject: |
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Also, there has been many fruitful ADP posts recently by Marty and others that has probably raise the awareness of them.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Aug 25, 2010 9:46 pm Post subject: |
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| I often use DPs, but before I got to any there was a flightless M-Wing (27) with a couple of pincer transports which was all that was needed. |
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