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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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 Posted: Sun Apr 11, 2010 12:20 am Post subject: mm 1734... 4-9-10 |
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000080001270000000108030209009500300043000150001004000900010806000000020800050000
| Code: |
+-------+-------+-------+
| . . . | . 8 . | . . 1 |
| 2 7 . | . . . | . . . |
| 1 . 8 | . 3 . | 2 . 9 |
+-------+-------+-------+
| . . 9 | 5 . . | 3 . . |
| . 4 3 | . . . | 1 5 . |
| . . 1 | . . 4 | . . . |
+-------+-------+-------+
| 9 . . | . 1 . | 8 . 6 |
| . . . | . . . | . 2 . |
| 8 . . | . 5 . | . . . |
+-------+-------+-------+
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Play online
| Quote: | extend the 67 w-wing. its pincers are in r3c4 and r8c3. the extension goes through the grouped linked in box 8 on 7's.
eliminates the 7 in r3c6.
actually on second glance, a ER on 6's will do it. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Apr 11, 2010 5:05 am Post subject: |
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| All those 67s, but I couldn't find a W-Wing. But an XY-Wing (367) and multi-coloring (6) did the job. The previous three puzzle were ultra easy but this was a tough nut to crack even though there were just a few moves. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Apr 11, 2010 1:39 pm Post subject: |
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I also used the w-wing 67.
Ted |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Mon Apr 12, 2010 12:14 pm Post subject: |
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I found a handful of +/- useless w-wings.
But one of them did it: a 56 w-wing (6)r1c6=r2c3 via SL (5) in row 2 removes 6 from r9c6 |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Apr 13, 2010 3:33 pm Post subject: |
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I didn't find any w-wings but here is a one step chain: | Code: | *--------------------------------------------------*
| 3 9 4 | 2 8 56 | 567 67 1 |
| 2 7 56 | 1 4 9 | 56 38 38 |
| 1 56 8 | 67 3 567 | 2 4 9 |
|----------------+----------------+----------------|
| 67 28 9 | 5 267 1 | 3 678 4 |
| 67 4 3 | 67 9 8 | 1 5 2 |
| 5 28 1 | 3 267 4 | 67 9 78 |
|----------------+----------------+----------------|
| 9 35 257 | 4 1 27 | 8 37 6 |
| 4 1 67 | 8 67 3 | 9 2 5 |
| 8 36 267 | 9 5 267 | 4 1 37 |
*--------------------------------------------------*
(6)r6c7=r6c5-r5c4=r3c4-(6=5)r3c2-(5=3)r7c2-(3=7)r7c8-(7=6)r1c8; r12c7,r4c8<>6
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Tue Apr 13, 2010 4:54 pm Post subject: |
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Oops  , I was so confused by the various useless and marginally useful wings that I failed to mention that the w-wing I described does not eliminate the candidate directly, but only after transport from r2c3 to r9c2.
AND ... the strong link on 5 that holds the w-wing together is in row 3 rather than row 2.
AND ... now that I look at the whole "transported w-wing" I see that it is just a simple m-wing:
| Code: |
+--------------------------+--------------------------+--------------------------+
| 3 9 4 | 2 8 56* | 567 67 1 |
| 2 7 56(w) | 1 4 9 | 56 38 38 |
| 1 56# 8 | 67 3 567# | 2 4 9 |
+--------------------------+--------------------------+--------------------------+
| 67 28 9 | 5 267 1 | 3 678 4 |
| 67 4 3 | 67 9 8 | 1 5 2 |
| 5 28 1 | 3 267 4 | 67 9 78 |
+--------------------------+--------------------------+--------------------------+
| 9 35 257 | 4 1 27 | 8 37 6 |
| 4 1 67 | 8 67 3 | 9 2 5 |
| 8 36* 267 | 9 5 2-67 | 4 1 37 |
+--------------------------+--------------------------+--------------------------+
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Sorry for the confusion ... |
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