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Vanhegan extreme July 29, 2012

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arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Sun Jul 29, 2012 6:04 am Post subject: Vanhegan extreme July 29, 2012

Code:

*-----------*
|.57|4..|..9|
|...|..6|..1|
|8..|9..|3.5|
|---+---+---|
|483|...|.1.|
|...|...|...|
|.7.|...|693|
|---+---+---|
|7.6|..9|..8|
|5..|8..|...|
|9..|..1|47.|
*-----------*

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Sun Jul 29, 2012 4:45 pm Post subject:

Code:

+-------------+--------------+------------+
| 16 5 7 | 4 1238 238 | 28 268 9 |
| 3 249 249 | 25 258 6 | 7 248 1 |
| 8 1246 124 | 9 127 27 | 3 246 5 |
+-------------+--------------+------------+
| 4 8 3 | 6 9 25 | 25 1 7 |
| 16 169 19 | 7 23 235 | 258 28 4 |
| 2 7 5 | 1 48 48 | 6 9 3 |
+-------------+--------------+------------+
| 7 234 6 | 23 24 9 | 1 5 8 |
| 5 124 124 | 8 2467 247 | 9 3 26 |
| 9 23 8 | 235 256 1 | 4 7 26 |
+-------------+--------------+------------+

Play this puzzle online at the Daily Sudoku site

Messier and less satisfying than I prefer (I got lazy and didn't check for chains or M-Wings).

Potential 49-19-14 DP in r258c23. Possibilities r2c23=2, r5c2=6, r8c23=2 yield common outcome r6c56=48.

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Sun Jul 29, 2012 6:31 pm Post subject:

Code:

*-----------------------------------------------------------*
| 16 5 7 | 4 1238 d23-8 |a28 268 9 |
| 3 249 249 | 25 258 6 | 7 248 1 |
| 8 1246 124 | 9 127 27 | 3 246 5 |
|-------------------+-------------------+-------------------|
| 4 8 3 | 6 9 25 | 25 1 7 |
| 16 169 19 | 7 23 c235 |b258 28 4 |
| 2 7 5 | 1 48 48 | 6 9 3 |
|-------------------+-------------------+-------------------|
| 7 234 6 | 23 24 9 | 1 5 8 |
| 5 124 124 | 8 2467 247 | 9 3 26 |
| 9 23 8 | 235 256 1 | 4 7 26 |
*-----------------------------------------------------------*
L3-wing
8r1c7=(8-5)r5c7=(5-3)r5c6=3r1c6 => -8r1c6

if r1c7 is not 8 then r1c6 is 3

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Mon Jul 30, 2012 2:24 pm Post subject:

Another solution is a AUR(25)r45c67[(8)r5c7=(3)r5c6]-(3=2=4=8)r576c5-r6c6=r1c6-r1c78=r2c8; -8r5c8 Ted

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Mon Jul 30, 2012 2:37 pm Post subject:

Marty R. wrote:

Code:

Play this puzzle online at the Daily Sudoku site

Potential 49-19-14 DP in r258c23. Possibilities r2c23=2, r5c2=6, r8c23=2 yield common outcome r6c56=48.

Marty,

I do not understand your statement that the common outcome is r6c56=48; this is already the condition after basics.

Ted

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Mon Jul 30, 2012 3:33 pm Post subject:

tlanglet wrote:

Marty R. wrote:

Code:

Play this puzzle online at the Daily Sudoku site

Potential 49-19-14 DP in r258c23. Possibilities r2c23=2, r5c2=6, r8c23=2 yield common outcome r6c56=48.

Marty,

I do not understand your statement that the common outcome is r6c56=48; this is already the condition after basics.

Ted

I screw up basics on a huge number of puzzles. Dan's grid shows the 48 pairs, but maybe he copied my grid. At any rate, I'm not seeing how the eliminations get made.

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Mon Jul 30, 2012 4:51 pm Post subject:

Marty R. wrote:

I screw up basics on a huge number of puzzles. Dan's grid shows the 48 pairs, but maybe he copied my grid. At any rate, I'm not seeing how the eliminations get made.

Code:

*--------------------------------------------------------------------*
| 1236 5 7 | 4 1238 238 | 28 268 9 |
| 23 2349 249 | 235 2358 6 | 7 248 1 |
| 8 1246 124 | 9 127 27 | 3 246 5 |
|----------------------+----------------------+----------------------|
| 4 8 3 | 6 9 25 | 25 1 7 |
| 126 1269 1259 | 7 23458 23458 | 258 248 24 |
| 2 7 25 | 1 2458 2458 | 6 9 3 |
|----------------------+----------------------+----------------------|
| 7 234 6 | 23 234 9 | 1 5 8 |
| 5 124 124 | 8 2467 247 | 9 3 26 |
| 9 23 8 | 235 2356 1 | 4 7 26 |
*--------------------------------------------------------------------*
Got there from here

dan

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Mon Jul 30, 2012 5:51 pm Post subject:

Dan, you overestimate me. Finesse doesn't work, I need to be hit over the head.

I'm stuck here, which is somewhat different from my original grid.

Code:

+-------------+-------------+----------+
| 16 5 7 | 4 18 28 | 8 26 9 |
| 3 249 249 | 235 35 6 | 7 24 1 |
| 8 1246 124 | 9 17 27 | 3 246 5 |
+-------------+-------------+----------+
| 4 8 3 | 6 9 5 | 2 1 7 |
| 16 169 19 | 7 2 3 | 5 8 4 |
| 2 7 5 | 1 48 48 | 6 9 3 |
+-------------+-------------+----------+
| 7 234 6 | 23 34 9 | 1 5 8 |
| 5 124 124 | 8 467 247 | 9 3 26 |
| 9 23 8 | 235 356 1 | 4 7 26 |
+-------------+-------------+----------+

Play this puzzle online at the Daily Sudoku site

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Mon Jul 30, 2012 6:45 pm Post subject:

Marty R. wrote:

Dan, you overestimate me. Finesse doesn't work, I need to be hit over the head.

I'm stuck here, which is somewhat different from my original grid.

Code:

Play this puzzle online at the Daily Sudoku site

The grid shown is invalid (does not have a solution) Confused

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Tue Jul 31, 2012 12:28 am Post subject:

Well, if you guys would like to let me in on the secret, I'd appreciate it. I tried it again with pencil and paper and end up with the same grid I posted originally, with r6c56 not solved. Is this grid invalid too?

Code:

Play this puzzle online at the Daily Sudoku site

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Tue Jul 31, 2012 1:39 am Post subject:

Marty R. wrote:

Code:

Play this puzzle online at the Daily Sudoku site

This one works!

Code:

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Tue Jul 31, 2012 4:02 am Post subject:

arkietech wrote:

Marty R. wrote:

Code:

Play this puzzle online at the Daily Sudoku site

This one works!

Code:

Thank you Dan. However, Ted noted that r6c56 were solved after basics and I still don't see how to get there. Question

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Tue Jul 31, 2012 5:04 am Post subject:

I haven't been following the discussion, but this is the after basics grid:

Code:

+----------------+----------------+----------------+
| 16 5 7 | 4 1238 238 | 28 268 9 |
| 3 249 249 | 25 258 6 | 7 248 1 |
| 8 1246 124 | 9 127 27 | 3 246 5 |
+----------------+----------------+----------------+
| 4 8 3 | 6 9 25 | 25 1 7 |
| 16 169 19 | 7 23 235 | 258 28 4 |
| 2 7 5 | 1 48 48 | 6 9 3 |
+----------------+----------------+----------------+
| 7 234 6 | 23 24 9 | 1 5 8 |
| 5 124 124 | 8 2467 247 | 9 3 26 |
| 9 23 8 | 235 256 1 | 4 7 26 |
+----------------+----------------+----------------+

There are two URs: 25 and 26.
Keith

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