Mystery Puzzle No 17

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Mystery Puzzle No 17

Postby Leren » Wed Mar 25, 2020 9:40 am

Code: Select all
*-----------*
|5.8|...|12.|
|...|...|..7|
|2..|..5|8.6|
|---+---+---|
|4..|..2|...|
|.8.|9..|...|
|...|..6|97.|
|---+---+---|
|...|2..|...|
|...|.7.|419|
|.3.|159|2..|
*-----------*
5.8...12.........72....58.64....2....8.9..........697....2.........7.419.3.1592..
Leren
 
Posts: 3912
Joined: 03 June 2012

Re: Mystery Puzzle No 17

Postby Cenoman » Wed Mar 25, 2020 4:41 pm

Code: Select all
 +--------------------------+-----------------------+-----------------------+
 |  5      4679    8        |  3467   3469   347    |  1     2      34      |
 |  1369   1469    1369     |  3468   2      1348   |  35    3459   7       |
 |  2      1479    1379     |  347    1349   5      |  8     349    6       |
 +--------------------------+-----------------------+-----------------------+
 |  4      5679-1  5679-13  |  357    13     2      |  356   8      135     |
 |  6-13   8       2567-13  |  9      134    1347   |  356   345    12345   |
 | #13    #125*   #1235*    |  458-3  48-13  6      |  9     7      245-13  |
 +--------------------------+-----------------------+-----------------------+
 |  1689   169     169      |  2      468    48     |  7     35     35      |
 |  68     25*     25*      |  368    7      38     |  4     1      9       |
 |  7      3       4        |  1      5      9      |  2     6      8       |
 +--------------------------+-----------------------+-----------------------+

UR(25)r68c23 using internals
(13)r6c123 => -13 b4p346, r6c59, -1 r4c2, -3r6c5; ste
(note -13r5c1 is enough to solve with ste finish)

This pattern is usually known as UR type 3.

The UR pattern solves the puzzle in one step. Good luck to find a one-stepper, without uniqueness techniques !
Thank you Leren for this instructive example.
Cenoman
Cenoman
 
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Joined: 21 November 2016
Location: Paris, France


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