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Vanhegan extreme June 24, 2012

 
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arkietech



Joined: 31 Jul 2008
Posts: 1686
Location: Northwest Arkansas USA

PostPosted: Sun Jun 24, 2012 6:23 am    Post subject: Vanhegan extreme June 24, 2012 Reply with quote

Code:

 *-----------*
 |..8|2.3|5..|
 |9..|568|..4|
 |...|...|...|
 |---+---+---|
 |2..|935|..7|
 |..3|.8.|9..|
 |6..|127|..8|
 |---+---+---|
 |...|...|...|
 |1..|742|..9|
 |..4|8.1|2..|
 *-----------*
 

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tlanglet



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

PostPosted: Sun Jun 24, 2012 1:11 pm    Post subject: Reply with quote

Code after basics:
Code:
 *-----------------------------------------------------------------------------*
 | 4       167     8       | 2       17      3       | 5       9       16      |
 | 9       1237    27      | 5       6       8       | 17      1237    4       |
 | 357     123567  56      | 4       17      9       | 1678    123678  1236    |
 |-------------------------+-------------------------+-------------------------|
 | 2       8       1       | 9       3       5       | 46      46      7       |
 | 57      57      3       | 6       8       4       | 9       12      12      |
 | 6       4       9       | 1       2       7       | 3       5       8       |
 |-------------------------+-------------------------+-------------------------|
 | 8       279     27      | 3       59      6       | 147     147     15      |
 | 1       356     56      | 7       4       2       | 68      368     9       |
 | 37      3679    4       | 8       59      1       | 2       367     356     |
 *-----------------------------------------------------------------------------*


Lots of AUR possibilities but I could not find anything really useful.

I did find a two step solution that used similar logic but was unable to combine into a one stepper.........

(2=1)r5c9-(1=5)r7c9-(59=27)r7c523-(7=3)r9c1-r9c9=(3)r3c9; r3c9<>2

ant(156=*3)r179c9-(3=7)r9c1-r7c3=r2c3-(7=*1)r2c7-(1=*6)r1c9-(136*=2)r3c9; r3c9<>16

Ted
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SudoQ



Joined: 02 Aug 2011
Posts: 127

PostPosted: Sun Jun 24, 2012 1:38 pm    Post subject: Reply with quote

A one stepper:
Code:
|-----------------|----------|--------------------|
| 4    167     8  | 2  17  3 | 5     9       16   |
| 9    1237    27 | 5  6   8 | 17    1237    4    |
| 357  123567  56 | 4  17  9 | 1678  123678  1236 |
|-----------------|----------|--------------------|
| 2    8       1  | 9  3   5 | 46    46      7    |
| 57   57      3  | 6  8   4 | 9     12      12   |
| 6    4       9  | 1  2   7 | 3     5       8    |
|-----------------|----------|--------------------|
| 8   (279)   (27)| 3 (59) 6 | 147   147   (5)1   |
| 1    356     56 | 7  4   2 | 68    368     9    |
|(37)  3679    4  | 8  59  1 | 2     367   (5)6-3 |
|-----------------|----------|--------------------|
r7c2=2 -> r7c3=7 -> r9c1=3
    =7 ->        -> r9c1=3 
    =9 -> r7c5=5 -> r9c9=5 => r9c9<>3

/SudoQ
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tlanglet



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

PostPosted: Sun Jun 24, 2012 1:57 pm    Post subject: Reply with quote

SudoQ wrote:
A one stepper:
Code:

r7c2=2 -> r7c3=7 -> r9c1=3
    =7 ->        -> r9c1=3 
    =9 -> r7c5=5 -> r9c9=5 => r9c9<>3

/SudoQ


Nice Exclamation

I looked at the anp(27=9)r7c32 but missed the deletion in r9c9; my bad.

Ted
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arkietech



Joined: 31 Jul 2008
Posts: 1686
Location: Northwest Arkansas USA

PostPosted: Sun Jun 24, 2012 7:40 pm    Post subject: Reply with quote

Code:
 *-----------------------------------------------------------------------------*
 | 4       167     8       | 2       17      3       | 5       9      c16      |
 | 9       1237    27      | 5       6       8       | 17      1237    4       |
 | 57-3    123567  56      | 4       17      9       | 1678    123678 c1236    |
 |-------------------------+-------------------------+-------------------------|
 | 2       8       1       | 9       3       5       | 46      46      7       |
 | 57      57      3       | 6       8       4       | 9       12     c12      |
 | 6       4       9       | 1       2       7       | 3       5       8       |
 |-------------------------+-------------------------+-------------------------|
 | 8      b279    b27      | 3      b59      6       | 147     147    c15      |
 | 1       356     56      | 7       4       2       | 68      368     9       |
 |a37      3679    4       | 8       59      1       | 2       367     56-3    |
 *-----------------------------------------------------------------------------*
(3=7)r9c1-(729=5)r7c235-(5126=3)r1357c9 -3r3c1,r9c9; stte

either r9c1 or r3c9 = 3
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Marty R.



Joined: 12 Feb 2006
Posts: 5061
Location: Rochester, NY, USA

PostPosted: Mon Jun 25, 2012 1:05 am    Post subject: Reply with quote

I played the X-Wing on 3 (perhaps not useful) and two AICs, one originating in r7c9 which eliminated some 1s and the other starting in r2c3 which eliminated some 7s.
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aran



Joined: 19 Apr 2010
Posts: 70

PostPosted: Mon Jun 25, 2012 12:38 pm    Post subject: Reply with quote

arkietech wrote:
Code:
 *-----------------------------------------------------------------------------*
 | 4       167     8       | 2       17      3       | 5       9      c16      |
 | 9       1237    27      | 5       6       8       | 17      1237    4       |
 | 57-3    123567  56      | 4       17      9       | 1678    123678 c1236    |
 |-------------------------+-------------------------+-------------------------|
 | 2       8       1       | 9       3       5       | 46      46      7       |
 | 57      57      3       | 6       8       4       | 9       12     c12      |
 | 6       4       9       | 1       2       7       | 3       5       8       |
 |-------------------------+-------------------------+-------------------------|
 | 8      b279    b27      | 3      b59      6       | 147     147    c15      |
 | 1       356     56      | 7       4       2       | 68      368     9       |
 |a37      3679    4       | 8       59      1       | 2       367     56-3    |
 *-----------------------------------------------------------------------------*
(3=7)r9c1-(729=5)r7c235-(5126=3)r1357c9 -3r3c1,r9c9

arkietech's move could be seen as an example of "extended" ALS x-z
(to illustrate, 4 candidate ALS are used but number is of course irrelevant)
(and using as standard notation : restricted commons in bold and opposite, z-candidate at start and finish of relevant sets)
If then ALS x-z is this
{zabc} {cdez}
then extended ALS x-z is
{zabc} {cdef} {fghz}
ie any z which sees all z in the extreme ALS is false

In arkietech's example
we have 12356r1357c9+2579r7c235+37r9c1 ie
{31265} {5297} {73} = <3>r9c9 <3>r3c1
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