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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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 Posted: Sat Oct 06, 2007 11:10 am Post subject: FP Puzzle: October 5, 2007 |
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The DB puzzles seem to be no more. Today's puzzle in the Free Press was trivial. Yesterday's, though, was kind of interesting:
| Code: | Puzzle: FP100507
+-------+-------+-------+
| . . . | . . . | . . . |
| 5 . . | . 1 . | 8 . 9 |
| 7 . . | 3 . 9 | . . 1 |
+-------+-------+-------+
| 1 . 2 | . . 8 | 4 . . |
| 9 . . | 4 . 1 | . . 7 |
| . . 7 | 9 . . | 2 . 5 |
+-------+-------+-------+
| 2 . . | 5 . 7 | . . 6 |
| 3 . 5 | . 9 . | . . 4 |
| . . . | . . . | . . . |
+-------+-------+-------+
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Keith |
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TKiel
Joined: 22 Feb 2006
Posts: 292
Location: Kalamazoo, MI
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| Posted: Sat Oct 06, 2007 12:22 pm Post subject: |
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The basics run out here
| Code: |
*-----------------------------------------------------------*
| 468 19 19 | 68 7 5 | 3 46 2 |
| 5 3 46 | 26 1 24 | 8 7 9 |
| 7 2 468 | 3 48 9 | 5 46 1 |
|-------------------+-------------------+-------------------|
| 1 6 2 | 7 5 8 | 4 9 3 |
| 9 5 3 | 4 2 1 | 6 8 7 |
| 48 48 7 | 9 6 3 | 2 1 5 |
|-------------------+-------------------+-------------------|
| 2 1489 1489 | 5 48 7 | 19 3 6 |
| 3 178 5 | 18 9 6 | 17 2 4 |
| 46 1479 1469 | 12 3 24 | 179 5 8 |
*-----------------------------------------------------------*
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at which point I used an XY-wing and a W-wing to finish it off. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Sat Oct 06, 2007 3:44 pm Post subject: |
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Interesting indeed - there are actually 2 overlapping xy-wings:
one with pivot r3c5 the other with pivot r1c4 in a configuration like this:
| Code: |
68 . . . 46
\ |
48 . . 46
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so that 4 and 6 get removed at the same time.
On a similar note, at the point where the w-wing is needed, there are actually quite a few xy chains, but also two w-wings that are even connected:
{4,8} in r3c3 connects to {4,8} in r7c5, which in turn connects to {4,8} in r6c2:
'48'(33)='86'(11)='64'(91)='42'(96)='24'(26)='48'(35)='84'(75)
'48'(62)='84'(61)='46'(91)='68'(11)='84'(33)='48'(35)='84'(75) |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Oct 06, 2007 4:02 pm Post subject: |
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| Two W-Wings, both on 46, did it for me. |
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Asellus
Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
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| Posted: Sat Oct 06, 2007 7:02 pm Post subject: |
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| This puzzle seems to be widely syndicated. It is carried, for instance, in the "LA Times" and several local papers. The Friday puzzles are the only difficult ones and are often interesting. I have posted one or two of them in the past. |
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