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Vanhegan extreme August 22, 2012

 
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arkietech



Joined: 31 Jul 2008
Posts: 1709
Location: Northwest Arkansas USA

PostPosted: Wed Aug 22, 2012 6:15 am    Post subject: Vanhegan extreme August 22, 2012 Reply with quote

Code:

 *-----------*
 |.9.|681|.7.|
 |61.|3..|.58|
 |...|.9.|...|
 |---+---+---|
 |1..|...|.25|
 |5.4|...|7.9|
 |97.|...|..6|
 |---+---+---|
 |...|.7.|...|
 |38.|..6|.97|
 |.5.|439|.8.|
 *-----------*
 

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tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Wed Aug 22, 2012 1:45 pm    Post subject: Reply with quote

Code after basics:
Code:
 *--------------------------------------------------*
 | 24   9    5    | 6    8    1    | 23   7    234  |
 | 6    1    7    | 3    2    4    | 9    5    8    |
 | 8    234  23   | 7    9    5    | 126  16   124  |
 |----------------+----------------+----------------|
 | 1    36   368  | 9    4    7    | 38   2    5    |
 | 5    23   4    | 128  6    238  | 7    13   9    |
 | 9    7    238  | 125  15   23   | 138  4    6    |
 |----------------+----------------+----------------|
 | 24   246  9    | 128  7    28   | 5    136  123  |
 | 3    8    12   | 125  15   6    | 4    9    7    |
 | 7    5    126  | 4    3    9    | 126  8    12   |
 *--------------------------------------------------*

I found this to be a fun, interesting puzzle. Several different techniques resulted in the same effective deletions but did not seem to directly contribute to a solution. But that endeavor led me to a long, somewhat messy chain.

2r1c1=2r7c1-(2=1)r8c3-r8c5=r6c5-r6c7=(1-3)r5c8=(3-6)r7c8=r9c7-r9c3=r7c2-(6=3)r4c2-(23=4)r53c2-(4=2)r1c1; 2r1c1

A shorter version of similar logic is
anp(6=24)r7c21-(2=1)r8c3-r8c5=r6c5-r6c7=(1-3)r5c8=(3-6)r7c8=r9c7; -6r7c8, r9c3

Ted

[Edited one time to add second version of solution]
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arkietech



Joined: 31 Jul 2008
Posts: 1709
Location: Northwest Arkansas USA

PostPosted: Wed Aug 22, 2012 2:23 pm    Post subject: Reply with quote

Code:

 *--------------------------------------------------*
 |b24   9    5    | 6    8    1    |a23   7    24-3 |
 | 6    1    7    | 3    2    4    | 9    5    8    |
 | 8    234  23   | 7    9    5    | 126  16   124  |
 |----------------+----------------+----------------|
 | 1    36   368  | 9    4    7    | 38   2    5    |
 | 5    23   4    | 128  6    238  | 7    13   9    |
 | 9    7    238  | 125  15   23   | 138  4    6    |
 |----------------+----------------+----------------|
 |c24   246  9    |c128  7   c28   | 5    136 c123  |
 | 3    8    12   | 125  15   6    | 4    9    7    |
 | 7    5    126  | 4    3    9    | 126  8    12   |
 *--------------------------------------------------*

(3=2)r1c7-(2=4)r1c1-(4=1283)r7c1469 => -3r1c9; stte

If r1c7 is not a 3 then r7c9 is a 3

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SudoQ



Joined: 02 Aug 2011
Posts: 127

PostPosted: Wed Aug 22, 2012 3:13 pm    Post subject: Reply with quote

arkietech wrote:
If r1c7 is not a 3 then r7c9 is a 3

A similar solution:
Code:
|--------------|---------------|-----------------|
|(24) 9    5   | 6     8   1   |(23)   7    24-3 |
| 6   1    7   | 3     2   4   | 9     5    8    |
| 8   234  23  | 7     9   5   | 1236  136  1234 |
|--------------|---------------|-----------------|
| 1   36   368 | 9     4   7   | 38    2    5    |
| 5   23   4   | 128   6   238 | 7     13   9    |
| 9   7    238 | 1258  15  238 | 138   4    6    |
|--------------|---------------|-----------------|
|(24) 2(46) 9  | 128   7   28  | 5    1(36) 12(3)|
| 3   8    12  | 125   15  6   | 4     9    7    |
| 7   5    126 | 4     3   9   | 126   8    12   |
|--------------|---------------|-----------------|
/SudoQ
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Marty R.



Joined: 12 Feb 2006
Posts: 5128
Location: Rochester, NY, USA

PostPosted: Thu Aug 23, 2012 4:20 am    Post subject: Reply with quote

Flightless M-Wing (12) in boxes 79 with long, convoluted pincer transport; r13c9<>2.

W-Wing (16), SL 1 in c9; r1c7, r7c8<>6.
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