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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Oct 20, 2010 2:15 am Post subject: Puzzle 10/10/20: C XY |
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| Code: | +-----------------------+
| 1 . . | . . . | . . . |
| . . 7 | 1 8 . | 3 . . |
| . 3 . | . 9 2 | . . . |
|-------+-------+-------|
| . 2 . | . 6 4 | . 1 . |
| . 4 8 | 5 . 1 | . . . |
| . . 9 | 8 2 3 | . 7 . |
|-------+-------+-------|
| . 9 . | . . . | 7 . 1 |
| . . . | 4 . 9 | . 8 . |
| . . . | . . . | 6 . 9 |
+-----------------------+
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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: Wed Oct 20, 2010 2:41 pm Post subject: |
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Interesting AUR; the internal SIS completes the puzzle in one step, and the external SIS provide different deletions that are very non-productive.
| Quote: | External SIS r1c789=5,r3c4=6: AUR(56)r12c26[(5)r1c789=(6)r3c4]-(6=5)r2c6; r1c6<>5
Internal SIS r1c2=8,r1c6=7: AUR(56)r12c26[(8)r1c2=(7)r1c6]-(7=8)r9c6; r9c2<>8 |
Ted |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Wed Oct 20, 2010 4:24 pm Post subject: |
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Ted, nice AUR move 
Those pincer moves are always satisfying! |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Oct 20, 2010 5:51 pm Post subject: |
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I see now that I'm going to need to expand my UR routine to handle some of the internal and external scenarios. _  _ |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Oct 20, 2010 6:19 pm Post subject: |
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| daj95376 wrote: | | I see now that I'm going to need to expand my UR routine to handle some of the internal and external scenarios. _ _ |
Danny,
As a sudoku addict, you may display the "sad" face, but I expect you look forward to expanding you tool kit of moves. => 
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Oct 22, 2010 4:38 pm Post subject: |
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Hidden UR (56); r1c2<>6, r1c6<>5
M-Wing (35); r8c9<>3
BUG+1 |
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