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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Aug 11, 2010 3:40 pm Post subject: Puzzle 10/08/11: A |
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| Code: | +-----------------------+
| . . 4 | . . 8 | 3 . 7 |
| . . . | . 4 6 | 2 8 5 |
| 8 . 9 | 7 . 2 | 1 4 . |
|-------+-------+-------|
| . . 5 | . . . | . . . |
| . 4 . | . 8 . | . . . |
| 6 2 8 | . . . | . 7 . |
|-------+-------+-------|
| 4 7 1 | . . . | . 6 . |
| . 3 6 | . . 4 | 8 5 . |
| 5 8 . | . . . | . . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
| Rating wrote: | XY+ --> unlikely a single-stepper
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Wed Aug 11, 2010 10:20 pm Post subject: Re: Puzzle 10/08/11: A |
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| Rating wrote: | | ..unlikely a single-stepper |
Rating - that's fighting talk where I come from! I admit to plenty of back and forth in SimpleSudoku to bag this beast... but it was fun looking for it 
An almost-AIC, making use of potential grouped strong link on 5 in b5. The fin is clearly not true but one side of the contradiction supports this play.
| Code: | Almost-AIC(1), fin (5)r6c5
AIC (1=5)r1c4 - r56c4=r56c6 - r7c6=(5-2)r7c5=r8c4 ; r8c4<>1
fin (5)r6c5 - (5=1)r1c5 - (16=2)r4c5 - r7c5=r8c4 ; r8c4<>1
- (5=4)r6c7 - (4=6)r4c7 -
Singles |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Thu Aug 12, 2010 4:40 am Post subject: |
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A two step solution.............
| Quote: | xy-wing -125 vertex (25)r7c5; r1c4,r9c5<>1
xy-wing 45-6 vertex (45)r6c7 and pseudocell pincer (56)r69c5; r4c5 |
Ted |
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