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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Nov 25, 2008 10:20 am Post subject: Extreme: Set E Puzzle 3 |
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While I'm looking for Moderate puzzles, maybe you'd like to play with this extreme puzzle. At least, that's what I'd call it. You're not allowed to say what you'd call it. 
| Code: | +-----------------------+
| . . . | . 4 5 | . . . |
| . 4 7 | 3 . . | . . . |
| . 3 6 | . 8 1 | 5 . 4 |
|-------+-------+-------|
| . 1 . | 8 . 3 | . . . |
| 7 . 5 | . 6 . | 3 . . |
| 3 . 4 | 5 . 7 | 8 . . |
|-------+-------+-------|
| . . 3 | . 5 4 | . . 1 |
| . . . | . . . | . 3 . |
| . . 1 | . . . | 9 . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site
| After Basics wrote: | Lenghty Remote Pair chain => 3x eliminations in (29)
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Nov 25, 2008 3:07 pm Post subject: |
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Well, this was a uniquely different puzzle I used five steps but only two techniques as follows. | Quote: | A four cell Remote Pair on <29> with deletions in r2c9
Another four cell Remote Pair on <<29> with deletions in r8c6
A six cell Remote Pair on <29> with deletions in r3c4
An eight cell Remote Pair on <29> with deletions in r6c8
A w=wing on <28> in r2c8 & r7c1 with sl in row <3> to delete <8> in r7c8 and complete the puzzle. |
Ted |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Tue Nov 25, 2008 3:57 pm Post subject: |
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Extreme, yes.
Coloring 2,
Coloring 9
Coloring 2
....
I lost track how often I found one more elimination in either 2 or 9.
Finally, again using a strong link (2), but this time as a w-wing:
w-wing (8)r7c1=r2c8 via SL (2) in row 3. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Nov 25, 2008 5:05 pm Post subject: |
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Ted: Your final elimination can also be viewed as the general form of the technique you used for your first three eliminations.  |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Tue Nov 25, 2008 10:19 pm Post subject: |
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| daj95376 wrote: | | Ted: Your final elimination can also be viewed as the general form of the technique you used for your first three eliminations. |
 Are you saying the <28> cells are a remote pair? I don't think so.
Actually, they are a complementary pair. Via strong links on <8>, you can say they have the same value. This solves them directly: The W-wing says one or both are <8>. If they are the same, they must both be <8>.
| Code: | +-------------+-------------+-------------+
| 1 29 8 | 26 4 5 | 267 279 3 |
| 5 4 7 | 3 29 269 | 1 28 68 |
| 29 3 6 | 7 8 1 | 5 29 4 |
+-------------+-------------+-------------+
| 6 1 29 | 8 29 3 | 47 45 57 |
| 7 8 5 | 4 6 29 | 3 1 29 |
| 3 29 4 | 5 1 7 | 8 6 29 |
+-------------+-------------+-------------+
| 28 67 3 | 9 5 4 | 267 278 1 |
| 249 56 29 | 1 7 68 | 24 3 568 |
| 48 567 1 | 26 3 268 | 9 45 578 |
+-------------+-------------+-------------+ |
I had the same solution as Ted, with the addition of a skyscraper that takes out <6> in R9C9.
Keith |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Nov 25, 2008 11:43 pm Post subject: |
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| Code: | *--------------------------------------------------*
| 1 29 8 | 26 4 5 | 267 279 3 |
| 5 4 7 | 3 B29 269 | 1 A28 68 |
| 29 3 6 | 7 8 1 | 5 29 4 |
|----------------+----------------+----------------|
| 6 1 D29 | 8 C29 3 | 47 45 57 |
| 7 8 5 | 4 6 29 | 3 1 29 |
| 3 29 4 | 5 1 7 | 8 6 29 |
|----------------+----------------+----------------|
|F28 67 3 | 9 5 4 | 267 27-8 1 |
| 249 56 E29 | 1 7 68 | 24 3 568 |
| 48 567 1 | 26 3 268 | 9 45 578 |
*--------------------------------------------------*
xy-chain |
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