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Menneske SH like VH

 
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tlanglet



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

PostPosted: Mon Jun 23, 2008 9:50 pm    Post subject: Menneske SH like VH Reply with quote

Here is a Menneske Super Hard puzzle, but two VH moves knocks it off.

Code:

 *-----------*
 |..9|...|..4|
 |...|.1.|.68|
 |...|6.3|...|
 |---+---+---|
 |.93|...|7..|
 |...|54.|.8.|
 |8..|...|.2.|
 |---+---+---|
 |36.|.72|.1.|
 |.2.|4..|...|
 |..1|.8.|...|
 *-----------*
 


Ted
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Mon Jun 23, 2008 11:40 pm    Post subject: Reply with quote

not seeing any VH techniques that solve this.

the most powerful move I see is an obvious remote pair/xy-chain/w-wing/m-wing (yes this pattern can be explained as all four).

which leads to another very obvious pattern that other posters love to use in the VH puzzles, but which are not needed in the VH puzzles.

Code:
.------------------.------------------.------------------.
| 6     17    9    | 278   25    578  | 123   37    4    |
| 257   3     257  | 27    1     4    | 9     6     8    |
| 1247  8     247  | 6     9     3    | 125   57    27   |
:------------------+------------------+------------------:
| 45    9     3    | 128   26    68   | 7     45    16   |
| 127   17    267  | 5     4     679  | 36    8     369  |
| 8     45    67   | 17    3     679  | 45    2     169  |
:------------------+------------------+------------------:
| 3     6     48   | 9     7     2    | 48    1     5    |
| 579   2     578  | 4     56    1    | 368   379   367  |
| 4579  45    1    | 3     8     56   | 246   479   267  |
'------------------'------------------'------------------'
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tlanglet



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

PostPosted: Tue Jun 24, 2008 12:27 am    Post subject: Reply with quote

storm_norm wrote:
not seeing any VH techniques that solve this.


Code:
.------------------.------------------.------------------.
| 6     17    9    | 278   25    578  | 123   37    4    |
| 257   3     257  | 27    1     4    | 9     6     8    |
| 1247  8     247  | 6     9     3    | 125   57    27   |
:------------------+------------------+------------------:
| 45b    9     3   | 128   26    68   | 7     45a   16   |
| 127   17    267  | 5     4     679  | 36    8     369  |
| 8     45c   67   | 17    3     679  | 45    2     169  |
:------------------+------------------+------------------:
| 3     6     48   | 9     7     2    | 48    1     5    |
| 579   2     578  | 4     56    1    | 368   379   367  |
| 4579  45d   1    | 3     8     56   | 246  -479   267  |
'------------------'------------------'------------------'


The Remote Pair <45> (abcd) removes the 4 in r9c8. After some lengthy cleanup, I had a Type 1 UR <36> in r58c79 which made r8c7=8 and that was it.

Ted
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ravel



Joined: 21 Apr 2006
Posts: 536

PostPosted: Tue Jun 24, 2008 8:57 am    Post subject: Reply with quote

Code:
.------------------.------------------.------------------.
| 6     17    9    | 278   25    578  | 123   37    4    |
| 257   3     257  | 27    1     4    | 9     6     8    |
| 1247  8     247  | 6     9     3    | 125   57    27   |
:------------------+------------------+------------------:
| 45    9     3    | 128   26    68   | 7     45    16   |
|*127  *17   #267  | 5     4    #679  |*36    8    #369  |
| 8     45   #67   |*17    3    #679  | 45    2    #169  |
:------------------+------------------+------------------:
| 3     6     48   | 9     7     2    | 48    1     5    |
| 579   2     578  | 4     56    1    | 368   379   367  |
| 4579  45    1    | 3     8     56   | 246   479   267  |
'------------------'------------------'------------------'

There is another move in this grid from the DP 67/679/69. To destroy it (looking at the rows), one of r5c12 and r6c4 must be 7 - all implying r6c3=6 - or r5c7=6. So r5c3<>6.
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tlanglet



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

PostPosted: Tue Jun 24, 2008 10:25 pm    Post subject: Reply with quote

ravel wrote:
Code:
.------------------.------------------.------------------.
| 6     17    9    | 278   25    578  | 123   37    4    |
| 257   3     257  | 27    1     4    | 9     6     8    |
| 1247  8     247  | 6     9     3    | 125   57    27   |
:------------------+------------------+------------------:
| 45    9     3    | 128   26    68   | 7     45    16   |
|*127  *17   #267  | 5     4    #679  |*36    8    #369  |
| 8     45   #67   |*17    3    #679  | 45    2    #169  |
:------------------+------------------+------------------:
| 3     6     48   | 9     7     2    | 48    1     5    |
| 579   2     578  | 4     56    1    | 368   379   367  |
| 4579  45    1    | 3     8     56   | 246   479   267  |
'------------------'------------------'------------------'

There is another move in this grid from the DP 67/679/69. To destroy it (looking at the rows), one of r5c12 and r6c4 must be 7 - all implying r6c3=6 - or r5c7=6. So r5c3<>6.


Great move Ravel!
Sorry to say, I did not even see it let alone try to solve it. Especially bad since Myth Jellies just provided details on conditions like this.

Ted
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Myth Jellies



Joined: 27 Jun 2006
Posts: 64

PostPosted: Fri Jun 27, 2008 7:36 am    Post subject: Reply with quote

(sigh) once again, people start finding these patterns more effectively than I ever could. Time to go invent a new one I guess.

Nice catch, Ravel.
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