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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Jul 20, 2010 4:18 am Post subject: Puzzle 10/07/20: A |
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My rating guideline is gone. It wasn't being used anyway.
| Code: | +-----------------------+
| 8 6 . | 4 . . | . 5 . |
| 1 . . | . 8 . | . . . |
| . . 2 | . . . | . . 8 |
|-------+-------+-------|
| 2 . . | 1 . . | . 7 . |
| . 7 . | . 4 9 | . 1 2 |
| . . . | . 7 2 | . 8 . |
|-------+-------+-------|
| . . . | . . . | . 6 . |
| 6 . . | 8 1 4 | 5 9 . |
| . . 3 | . 6 . | . . 4 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Jul 21, 2010 4:20 am Post subject: |
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| Looking at the potential 18 DP in boxes 79, the box 7 DP killers are invalid; r6c2<>1. |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Wed Jul 21, 2010 7:01 am Post subject: |
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This xy-chain jumped out at me...(though when I started I was planning on looking for turbots - without Danny's guidance  )
| Quote: | | xy-chain (5=3)r5c1 - (3=6)r5c7 -(6=1)r3c7 - (1=6)r3c6 - (6=7)r2c6 -(7=5)r9c6; r9c1<>5 |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Jul 21, 2010 3:49 pm Post subject: |
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| peterj wrote: | This xy-chain jumped out at me.
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It's a good thing you found the xy-chain. Not only don't I provide rating information, I now randomly assign difficulty to the ABC designators. They don't necessarily go from easiest to hardest! _  _ |
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