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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Wed Jul 21, 2010 3:44 pm Post subject: Puzzle 10/07/21: C |
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| Code: | +-----------------------+
| 8 . . | . 7 . | . . 4 |
| . 7 . | . 2 . | . . . |
| . . 9 | . 5 8 | 2 7 . |
|-------+-------+-------|
| . . . | . 9 . | . . 5 |
| 2 5 4 | 8 1 . | . 3 . |
| . . 8 | . . 7 | . . . |
|-------+-------+-------|
| . . 5 | . . . | 3 . . |
| . . 7 | . 4 . | . . 9 |
| 4 . . | 2 . . | . 5 1 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Jul 22, 2010 4:49 am Post subject: |
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Strong Links on 3,6,8 make for this discontinuity:
(8)r7c5-(8=6)r9c5-(6=3)r9c3-r8c1=r3c1-r3c9=(3-8)r2c9=r7c9-(8)r7c5 |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Thu Jul 22, 2010 6:49 am Post subject: |
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An almost xy-wing (with the benefit of hindsight..  I played the ER(1) before it the first time.)
| Quote: | Almost xy-wing(36-9) r9c3 fin (1)r7c1
(1)r7c1 - r3c1=r3c4 - (1=3)r8c4 - (3=9)r9c6; r7c6<>9 |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Thu Jul 22, 2010 10:31 am Post subject: |
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| peterj wrote: | An almost xy-wing (with the benefit of hindsight ...)
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Yes, some interesting solutions can be found using this technique. _  _ |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Jul 22, 2010 12:56 pm Post subject: |
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| I'm getting a sense of déjà vu or perhaps that should that be jamais vu........ |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Thu Jul 22, 2010 3:14 pm Post subject: |
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| I seem to recall the Maxwell Wave equations have a solution where information is passed in negative time - my solution was merely a practical application of that! |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Jul 22, 2010 3:56 pm Post subject: |
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| peterj wrote: | | I seem to recall the Maxwell Wave equations have a solution where information is passed in negative time - my solution was merely a practical application of that! |
Didn't Maxwell have a brother - Marcel ? |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Jul 23, 2010 12:04 am Post subject: |
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| I played an XY-Wing on 136, then looked at the implications of the potential DP 69 in boxes 23. That made some eliminations, after which the 69 became a Type 1. Finished with multi-coloring on 3. |
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