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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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 Posted: Fri May 09, 2008 4:04 am Post subject: competition #1034 |
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| Code: | 3 . .|. . .|. . 1
. . 6|. . .|3 . 9
. . .|7 . 2|. 6 .
-----+-----+-----
9 . .|. . 6|1 . .
. 3 .|. . .|. 5 .
. . 8|4 . .|9 . .
-----+-----+-----
. 6 .|1 . 9|. . .
5 . 9|. . .|2 . .
7 . .|. 6 .|. . 4 |
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Victor
Joined: 29 Sep 2005
Posts: 207
Location: NI
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| Posted: Fri May 09, 2008 1:16 pm Post subject: |
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Nice puzzle | Code: |
+--------------+---------------+--------------+
| 3 4578 457 | 6 9 458 | 478 2 1 |
| 2 4578 6 | 58 1458 1458 | 3 78 9 |
| 148 9 14 | 7 3 2 | 48 6 5 |
+--------------+---------------+--------------+
| 9 257 57 | 358 2578 6 | 1 4 2378 |
| 14 3 14 | 9 278 78 | 6 5 278 |
| 6 257 8 | 4 1257 1357 | 9 37 237 |
+--------------+---------------+--------------+
| 48 6 2 | 1 458 9 | 578 378 37 |
| 5 48 9 | 38 478 3478 | 2 1 6 |
| 7 1 3 | 2 6 58 | 58 9 4 |
+--------------+---------------+--------------+
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There's a skyscraper in c34 which eliminates the 5s in r1c6 and r2c2. Then there's a standard ER based on the 8s in c8, which removes 8 from r2c2. And then there's an interesting ER again based on the 8s in c8. If you bounce them round a little bit, you can say that they both 'see' the 8 in r1c2. (Yes, no doubt you can see this as an x-xycle of some sort.) That exposes an X-wing in 8s in c67, which takes us to: | Code: |
+-----------+-------------+-------------+
| 3 457 457 | 6 9 48 | 78 2 1 |
| 2 47 6 | 58 1458 145 | 3 78 9 |
| 8 9 1 | 7 3 2 | 4 6 5 |
+-----------+-------------+-------------+
| 9 257 57 | 58 258 6 | 1 4 2378 |
| 1 3 4 | 9 28 7 | 6 5 28 |
| 6 257 8 | 4 125 135 | 9 37 237 |
+-----------+-------------+-------------+
| 4 6 2 | 1 58 9 | 57 378 37 |
| 5 8 9 | 3 7 4 | 2 1 6 |
| 7 1 3 | 2 6 58 | 58 9 4 |
+-----------+-------------+-------------+
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More later if nobody else gets in first or finds a better way to do it!
Edit: realise I hadn't cleaned up the grid properly: I think it's actually finished in effect.
Last edited by Victor on Fri May 09, 2008 2:47 pm; edited 1 time in total |
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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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| Posted: Fri May 09, 2008 2:39 pm Post subject: competition |
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Perhaps not better, but different.
A skyscraper in 5's eliminates 5 from R1C6, the another skyscraper in 8's eliminates 8 from R2C2, making possible an xy-wing of 478 which eliminates the 4 from R3C3, to open the puzzle. Lots of fun!
Earl |
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Asellus
Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
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| Posted: Fri May 09, 2008 8:38 pm Post subject: |
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Earl,
Your two Skyscrapers alone solve the puzzle. Be sure to make all the eliminations, however. The first eliminates <5> from r2c2 as well as r1c6. The second eliminates <8> from r3c7 as well as r2c2. This determines r3c3 as <1> so there's no XY Wing. Later, you must spot a 478 Naked Triple in c6. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun May 25, 2008 4:48 am Post subject: |
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| I'm a couple of weeks behind on these things, but this puzzle wasn't worthy of the "diabolical" rating. It affects nothing, but the 3 comes out from r6c9 to preclude a DP. The 14 UR in boxes 14 solves r3c1 = 8. After the eliminations therefrom, one ER on 5 finished it off. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun May 25, 2008 4:19 pm Post subject: |
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Multi-coloring on 8s is a single move that solves this puzzle. 
Ted |
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