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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Sat May 22, 2010 1:34 pm Post subject: May 22 DB |
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The May 22 DB starts off a bit challenging, but then only one "big" step after basics.
A solution: skyscraper 4
Earl
| Code: |
+-------+-------+-------+
| . 6 . | . . 9 | 8 . . |
| 3 . . | . . . | . . . |
| . 2 8 | 1 . 3 | . 6 . |
+-------+-------+-------+
| . . . | 2 . . | . 9 4 |
| . 1 . | . . . | . 2 . |
| 4 7 . | . . 5 | . . . |
+-------+-------+-------+
| . 3 . | 6 . 8 | 1 7 . |
| . . . | . . . | . . 9 |
| . . 5 | 7 . . | . 4 . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Sun May 23, 2010 2:13 pm Post subject: |
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I don't think I've ever seen meaner basics. Was that a "quintuplet" in C7, I saw? I ended up trying colouring on <4> and found an impossible situation with two of the same colours in C5 - so I assumed these were wrong and chose the other colour. Is there a name for that? Anyway it worked.
Definitely one of the best.
Craig |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun May 23, 2010 3:31 pm Post subject: |
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| Quote: | | Was that a "quintuplet" in C7, I saw? |
Yes indeed, but the cognoscenti refers to them as "quints."   |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Sun May 23, 2010 10:01 pm Post subject: |
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| Quote: | | Yes indeed, but the cognoscenti refers to them as "quints." |
I thought Quint was that boat pilot in Jaws. |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Tue May 25, 2010 8:58 am Post subject: |
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Marty you are clearly not a good Italian Boy!
Cognoscente "refers"
Cognoscenti "refer" because the cognoscenti are plural.
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Tue May 25, 2010 9:02 am Post subject: |
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| cgordon wrote: | I don't think I've ever seen meaner basics. Was that a "quintuplet" in C7, I saw? I ended up trying colouring on <4> and found an impossible situation with two of the same colours in C5 - so I assumed these were wrong and chose the other colour. Is there a name for that? Anyway it worked.
Definitely one of the best.
Craig |
Hi Craig,
Your technique found a truth contradiction:In colouring if two of the same colour end up in the same stack/band/house they must be false. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Tue May 25, 2010 12:58 pm Post subject: |
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| Quote: | | Your technique found a truth contradiction:In colouring if two of the same colour end up in the same stack/band/house they must be false. |
I've since seen it referred to as a Color Wrap (or Colour Wrap if you're bilingual). |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Tue May 25, 2010 5:17 pm Post subject: |
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God bless the Canadians for being able to spell!
Ronk was speculating on similar colouring related terminology - I've been out of the swing of all that nomenclature stuff for the last couple of years so I haven't sorted out my "wraps" and "traps" yet - but to be honest I see them all as colouring. |
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