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VH -- Pat # 178 ##

 
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Pat



Joined: 23 Feb 2010
Posts: 165

PostPosted: Mon Jun 18, 2012 11:12 am    Post subject: VH -- Pat # 178 ## Reply with quote


    arkietech wrote:

    Pat wrote:

    however, it only needs "basic" moves


    Of course. But that is not any fun.

okay then, here's a puzzle for you --
can't be solved by "basic" moves,
requires something extra

    .1...4...9...8.6.........5.....9...6.2.4.1.3.1...2.4...3...2.....8.6...9...3...4.

    [ play ]
Code:

 . 1 . | . . 4 | . . .
 9 . . | . 8 . | 6 . .
 . . . | . . . | . 5 .
-------+-------+------
 . . . | . 9 . | . . 6
 . 2 . | 4 . 1 | . 3 .
 1 . . | . 2 . | 4 . .
-------+-------+------
 . 3 . | . . 2 | . . .
 . . 8 | . 6 . | . . 9
 . . . | 3 . . | . 4 .

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arkietech



Joined: 31 Jul 2008
Posts: 1729
Location: Northwest Arkansas USA

PostPosted: Mon Jun 18, 2012 12:39 pm    Post subject: Re: VH -- Pat # 178 ## Reply with quote

Pat wrote:
requires something extra


Pat, I like your puzzles Exclamation Very Happy
Code:
I ran out of basic (lcls) moves here
 *-----------------------------------------------------------------------------*
 | 235678  1       23567   | 25679   357     4       | 2789    89      2378    |
 | 9      b457     23457   | 1257    8      b57      | 6      c127     12347   |
 | 234678  4678    23467   | 12679   137     69      | 12789   5       123478  |
 |-------------------------+-------------------------+-------------------------|
 | 34578   4578    3457    | 578     9       38      | 12     c12      6       |
 | 5678    2       5679    | 4       57      1       | 5789    3       578     |
 | 1       5789    3579    | 5678    2       368     | 4       89      578     |
 |-------------------------+-------------------------+-------------------------|
 | 57      3       1579    | 89      4       2       | 1578    6       1578    |
 | 2457   a457     8       |a157     6      a57      | 3       27-1    9       |
 | 2567    5679    125679  | 3       157     89      | 12578   4       12578   |
 *-----------------------------------------------------------------------------*
There are a couple of x-wings here but I like a one step solution plus a hidden pair.

(1=457)r8c246-(4=57)r2c26-(7=12)r24c8 => -1r8c8; lclste (hidden pair)

either r8c4=1 or r24c8=12
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SudoQ



Joined: 02 Aug 2011
Posts: 127

PostPosted: Mon Jun 18, 2012 1:47 pm    Post subject: Reply with quote

A similar solution pattern:
Code:
|----------------------|-----------------|--------------------|
| 235678  1     23567  | 25679  357  4   | 2789   89   2378   |
| 9      (457)  23457  | 1257   8   (57) | 6     12(7) 12347  |
| 234678  4678  23467  | 12679  137  69  | 12789  5    123478 |
|----------------------|-----------------|--------------------|
| 34578   4578  3457   | 578    9    38  | 12     12   6      |
| 5678    2     5679   | 4      57   1   | 5789   3    578    |
| 1       5789  3579   | 5678   2    368 | 4      89   578    |
|----------------------|-----------------|--------------------|
| 57      3     1579   | 89     4    2   | 1578   6    1578   |
|(24)57  (4)57   8     | 157    6    57  | 3    (27)-1  9     |
| 2567    5679  125679 | 3      157  89  | 12578  4    12578  |
|----------------------|-----------------|--------------------|

r2c2=4 -> r8c1=4 -> r8c8=2
    =5 -> r2c6=7 ->
    =7 ->        -> r8c8=7 => r8c8<>1
/SudoQ
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Marty R.



Joined: 12 Feb 2006
Posts: 5175
Location: Rochester, NY, USA

PostPosted: Tue Jun 19, 2012 1:41 am    Post subject: Reply with quote

I was looking at a horrendous grid loaded with polyvalue cells and was ready to throw in the towel. Then I noticed the 127 triple in c8, after which I used a W-Wing on 89 (apparently not needed) and X-Wings on 7 and 5.
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Pat



Joined: 23 Feb 2010
Posts: 165

PostPosted: Tue Jun 19, 2012 8:15 am    Post subject: Reply with quote

Marty R. wrote:
X-wings on 7 and 5

yes!! i was so hoping someone would notice

solved by "basic" moves + this extra: 2 X-wings

(seen such before, but not very common)
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