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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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 Posted: Fri Jul 09, 2010 1:03 pm Post subject: Free Press Jul 9, 2010 |
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Not yet started ...
| Code: |
Puzzle: FP070910
+-------+-------+-------+
| . 5 . | . . 1 | . . 4 |
| . . . | 9 4 2 | . . . |
| . . 7 | . . . | . . . |
+-------+-------+-------+
| . 1 . | . . 5 | . 2 . |
| . . 8 | . . . | 4 . . |
| . 7 . | 4 . . | . 6 . |
+-------+-------+-------+
| . . . | . . . | 8 . . |
| 1 . . | 7 3 . | . . 2 |
| 3 . . | 6 . 4 | . 7 . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
Keith |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Jul 09, 2010 6:10 pm Post subject: |
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| Quote: | | Two chains, not sure if they qualified as pure XY-Chains or not. Then a flightless XY-Wing (295) with pincer transport. |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Sat Jul 10, 2010 3:44 pm Post subject: |
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This my first almost XYZ-wing (shown in asterisks)
The digit spoiling the xyz is the fin 1 (shown as 1+) in r9c9
If fin 1 is false then XYZ 159 is true and r8c7<>5 and puzzle solved
otherwise
If fin 1 is true then (59=1)r9c9-(1=9)r3c9-(9)r4c9 so r4c9<> 9 solves puzzle.
[Ed footnote]
To bag it in a chain looks a little like this:
(59=1)r9c9-(1=9)r3c9-(9=7)r4c9-(7=9)r4c7-(9=15)r69c7 so r8c7<>5
| Code: | +----------------+----------------+----------------+
| 69 5 69 | 3 7 1 | 2 8 4 |
| 8 3 1 | 9 4 2 | 67 5 67 |
| 2 4 7 | 5 8 6 | 3 19 19 |
+----------------+----------------+----------------+
| 4 1 3 | 8 6 5 | 79 2 79 |
| 569 269 8 | 12 129 7 | 4 13 135 |
| 59 7 29 | 4 129 3 | 15* 6 8 |
+----------------+----------------+----------------+
| 7 26 2456 | 12 125 9 | 8 134 1356 |
| 1 69 4569 | 7 3 8 | 69-5 49 2 |
| 3 8 259 | 6 125 4 | 159* 7 1+59*|
+----------------+----------------+----------------+ |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon Jul 12, 2010 3:13 am Post subject: |
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MM,
That almost xyz-wing is beautiful, especially the handling of the fin.
Ted |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Mon Jul 12, 2010 10:58 pm Post subject: |
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| Cheers Ted. |
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