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Impossible Menneske No. 07

 
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keith



Joined: 19 Sep 2005
Posts: 3184
Location: near Detroit, Michigan, USA

PostPosted: Sat Mar 09, 2013 3:29 pm    Post subject: Impossible Menneske No. 07 Reply with quote

Let's try another.
Code:
M6912881  Impossible (7695)
+-------+-------+-------+
| . . 1 | 5 . 9 | . 8 . |
| 7 . . | . . . | . . 5 |
| 6 . 5 | . 3 7 | . . . |
+-------+-------+-------+
| . 3 6 | . . . | 2 . . |
| . . . | 2 . . | . . . |
| . . 9 | . . . | . 4 . |
+-------+-------+-------+
| 9 . . | . . . | . . 1 |
| . . . | . . . | . . 3 |
| . 5 . | 1 . 4 | 8 . . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Keith


Last edited by keith on Sun Mar 17, 2013 4:34 am; edited 1 time in total
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JC Van Hay



Joined: 13 Jun 2010
Posts: 373
Location: Charleroi, Belgium

PostPosted: Sat Mar 09, 2013 6:29 pm    Post subject: Reply with quote

Basics are optional !
Code:
+-----------------------+-----------------------+------------------------+
| 234   (24)    1       | 5     46(2)    9      | 3467    8       67(24) |
| 7     2489    348(2)  | 468   1468(2)  168(2) | 13469   12369   5      |
| 6     2489    5       | 48    3        7      | 149     129     9(24)  |
+-----------------------+-----------------------+------------------------+
| 1458  3       6       | 4789  145789   158    | 2       1579    789    |
| 1458  1478    478     | 2     1456789  13568  | 135679  135679  6789   |
| 1258  1278    9       | 3678  15678    13568  | 13567   4       678    |
+-----------------------+-----------------------+------------------------+
| 9     24678   3478(2) | 3678  25678    23568  | 4567    2567    1      |
| 1248  124678  478(2)  | 6789  256789   2568   | 45679   25679   3      |
| 3-2   5       37(2)   | 1     2679     4      | 8       2679    679(2) |
+-----------------------+-----------------------+------------------------+
Chain[5] : 2r789c3=2r2c3-2r2c56=24r1c25-24r13c9=2r9c9 :=> -2r9c1;ste
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arkietech



Joined: 31 Jul 2008
Posts: 1733
Location: Northwest Arkansas USA

PostPosted: Sat Mar 09, 2013 7:21 pm    Post subject: Reply with quote

Code:
 *--------------------------------------------------------------------------------------*
 | 234      24       1        | 5        246      9        | 367      8        2467     |
 | 7        2489     23-48    | 468      12468    1268     | 369      2369     5        |
 | 6        2489     5        | 48       3        7        | 19       129      249      |
 |----------------------------+----------------------------+----------------------------|
 | 1458     3        6        | 4789     145789   158      | 2        1579     789      |
 | 1458     1478    b478      | 2        1456789  13568    | 135679   135679   6789     |
 | 1258     1278     9        | 3678     15678    13568    | 13567    4        678      |
 |----------------------------+----------------------------+----------------------------|
 | 9        4678-2  a2478     | 3678     25678    23568    | 4567     2567     1        |
 | 148-2    14678-2 a2478     | 6789     256789   2568     | 45679    25679    3        |
 |c23       5       a237      | 1        2679     4        | 8        2679     2679     |
 *--------------------------------------------------------------------------------------*
Sue de Coq
r789c3 r5c3 r9c1 => -2r78c2,r8c1 -48r2c3; lclste
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keith



Joined: 19 Sep 2005
Posts: 3184
Location: near Detroit, Michigan, USA

PostPosted: Sat Mar 16, 2013 3:02 am    Post subject: Reply with quote

Well,

oaxen asked for these puzzles and is not replying to them ...

Goodnight, moon.

Keith
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oaxen



Joined: 10 Jul 2006
Posts: 96

PostPosted: Sat Mar 16, 2013 8:51 am    Post subject: Reply with quote

Dear keith
Some posts I have done. and for sure I play them all. So I am very grateful to you, thank you
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keith



Joined: 19 Sep 2005
Posts: 3184
Location: near Detroit, Michigan, USA

PostPosted: Sat Mar 16, 2013 8:56 am    Post subject: Reply with quote

It would be nice to see more discussion.

By the way, I have convinced myself to try solving hard puzzles the way you do, oaxen.

Keith
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oaxen



Joined: 10 Jul 2006
Posts: 96

PostPosted: Sat Mar 16, 2013 10:25 am    Post subject: Reply with quote

No basic at all in the beginning.
I tested "3" on row 1 and rather soon it was obvious that 3 shall be in R1C7 and in both cases a bunch of correct numbers show up.
After that just solve with ordinary basic techniques. So in a way, this Menneske was rather easy, sometimes one has to open secondary chains and the paper is full with intricate pencilmarks. Very Happy
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