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Auburnmom
Joined: 13 Mar 2008
Posts: 25
Location: Auburn, AL
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 Posted: Sat Jul 17, 2010 11:16 pm Post subject: July 17 DB |
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2 48 8 14 3 6 5 7 19
49 3 7 2 5 14 8 6 19
5 6 1 7 9 8 3 4 2
7 5 3 19 4 19 2 8 6
6 8 4 5 7 2 1 9 3
1 2 9 8 6 3 4 5 7
489 49 6 3 1 459 7 2 58
489 1 5 49 2 7 6 3 48
489 1 5 49 2 7 6 3 48
3 7 2 6 8 45 9 1 45
I don't know how to set this up. Can you read it and help with a solution> |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Jul 18, 2010 2:04 am Post subject: |
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Auburnmom,
Please post the original puzzle. The one you have posted is not valid. For example, it has ten rows!
Even if I correct what seems to be your typo, R1C2 cannot be 48.
Keith |
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Auburnmom
Joined: 13 Mar 2008
Posts: 25
Location: Auburn, AL
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| Posted: Sun Jul 18, 2010 2:59 pm Post subject: |
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| Code: | +-------+-------+-------+
| . . . | . . 6 | 5 7 . |
| . 3 . | 2 5 . | . 6 . |
| . . 1 | . 9 . | . . . |
+-------+-------+-------+
| 7 . 3 | . . . | 2 . . |
| . . 4 | 5 . 2 | 1 . . |
| . . 9 | . . . | 4 . 7 |
+-------+-------+-------+
| . . . | . 1 . | 7 . . |
| . 1 . | . 2 7 | . 3 . |
| . 7 2 | 6 . . | . . . |
+-------+-------+-------+ |
Original puzzle
Sorry for the errors. Now I'll try to post my status |
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Auburnmom
Joined: 13 Mar 2008
Posts: 25
Location: Auburn, AL
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| Posted: Sun Jul 18, 2010 3:05 pm Post subject: |
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Here is where I am: sorry for the error last night, it was late.....
| Code: | +----------+----------+--------+
| 2 49 8 | 14 3 6 | 5 7 19 |
| 49 3 7 | 2 5 14 | 8 6 19 |
| 5 6 1 | 7 9 8 | 3 4 2 |
+----------+----------+--------+
| 7 5 3 | 19 4 19 | 2 8 6 |
| 6 8 4 | 5 7 2 | 1 9 3 |
| 1 2 9 | 8 6 3 | 4 5 7 |
+----------+----------+--------+
| 489 49 6 | 3 1 459 | 7 2 58 |
| 489 1 5 | 49 2 7 | 6 3 48 |
| 3 7 2 | 6 8 45 | 9 1 45 |
+----------+----------+--------+ |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Jul 18, 2010 4:37 pm Post subject: |
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I'll take a closer look, but in the grid you posted, take a close look at 4.
Step 1:
Step 2:
Keith |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Jul 18, 2010 4:47 pm Post subject: |
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From the original puzzle, after basics:
| Code: | +----------------+----------------+----------------+
| 2 49 8 | 14@ 3 6 | 5 7 19 |
| 49# 3 7 | 2 5 14@ | 8 6 19 |
| 5 6 1 | 7 9 8 | 3 24 24 |
+----------------+----------------+----------------+
| 7 5 3 | 19 4 19 | 2 8 6 |
| 6 8 4 | 5 7 2 | 1 9 3 |
| 1 2 9 | 8 6 3 | 4 5 7 |
+----------------+----------------+----------------+
| 489 49 6 | 3 1 459 | 7 24 2458 |
|-48-9 1 5 | 49# 2 7 | 6 3 48 |
| 3 7 2 | 6 8 45 | 9 1 45 |
+----------------+----------------+----------------+ |
The pattern marked is both a kite / skyscraper on 4 and a W-wing 4-9. Solving R8C1 as 8, and the puzzle.
There are other moves: A UR 24, coloring (kites, skyscrapers) on 4 leading to a BUG+1, ...
Keith |
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Auburnmom
Joined: 13 Mar 2008
Posts: 25
Location: Auburn, AL
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| Posted: Sun Jul 18, 2010 5:01 pm Post subject: |
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| Thanks Keith. I have trouble with skyscraper and kite is new to me. Will do some reading and hopefully improve. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sun Jul 18, 2010 6:49 pm Post subject: |
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| Auburnmom wrote: | | Thanks Keith. I have trouble with skyscraper and kite is new to me. Will do some reading and hopefully improve. |
Logically, a skyscraper and a kite are the same thing. After basics: | Code: | +----------------+----------------+----------------+
| 2 49@ 8 | 14@ 3 6 | 5 7 19 |
| 49 3 7 | 2 5 14 | 8 6 19 |
| 5 6 1 | 7 9 8 | 3 24 24 |
+----------------+----------------+----------------+
| 7 5 3 | 19 4 19 | 2 8 6 |
| 6 8 4 | 5 7 2 | 1 9 3 |
| 1 2 9 | 8 6 3 | 4 5 7 |
+----------------+----------------+----------------+
| 489 49# 6 | 3 1 -459 | 7 24 2458 |
| -489 1 5 | 49# 2 7 | 6 3 48 |
| 3 7 2 | 6 8 45 | 9 1 45 |
+----------------+----------------+----------------+ |
Note the strong links on 4 in C24. In R1, at least one of the cells @ is false. (The link in R1 can be strong or weak.) So, at least one of the cells # is true. The cells # are pincers on 4, making two eliminations as shown.
Now, check out Havard's classic explanation. The link is in this thread:
http://www.dailysudoku.com/sudoku/forums/viewtopic.php?t=4203
You'll have this down in no time!
Best wishes,
Keith |
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