au tough November 24, 2012

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au tough November 24, 2012

Postby ArkieTech » Sun Nov 25, 2012 5:55 am

Code: Select all
 *-----------*
 |92.|...|.4.|
 |..8|3..|9..|
 |...|...|..6|
 |---+---+---|
 |.9.|.8.|6..|
 |5..|...|..2|
 |..7|.3.|.5.|
 |---+---+---|
 |4..|...|...|
 |..1|..6|7..|
 |.3.|...|.25|
 *-----------*


Play/Print this puzzle online
dan
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Re: au tough November 24, 2012

Postby storm_norm22 » Sun Nov 25, 2012 7:44 am

Code: Select all
+---------+-------------------+---------+
| 9  2  3 | 167   167    17   | 5  4  8 |
| 6  4  8 | 3     (25)   5(2) | 9  1  7 |
| 1  7  5 | 489   49     489  | 2  3  6 |
+---------+-------------------+---------+
| 3  9  2 | 15    8      15   | 6  7  4 |
| 5  1  4 | 679   679    79   | 3  8  2 |
| 8  6  7 | (24)  3      4(2) | 1  5  9 |
+---------+-------------------+---------+
| 4  5  9 | 27    27     3    | 8  6  1 |
| 2  8  1 | 5(4)  -5(4)  6    | 7  9  3 |
| 7  3  6 | 189   19     189  | 4  2  5 |
+---------+-------------------+---------+


so I guess there are a couple chains like this. so here is the one I found
(5=2)r2c5 - (2)r2c6 = (2)r6c6 - (2=4)r6c4 - (4)r8c4 = (4)r8c5; r8c5 <> 5
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Re: au tough November 24, 2012

Postby ArkieTech » Sun Nov 25, 2012 12:10 pm

a little different -- same result
Code: Select all
 *--------------------------------------------------*
 | 9    2    3    | 167  167  17   | 5    4    8    |
 | 6    4    8    | 3   a25   25   | 9    1    7    |
 | 1    7    5    | 489  49   489  | 2    3    6    |
 |----------------+----------------+----------------|
 | 3    9    2    | 15   8    15   | 6    7    4    |
 | 5    1    4    | 679  679  79   | 3    8    2    |
 | 8    6    7    |c24   3    24   | 1    5    9    |
 |----------------+----------------+----------------|
 | 4    5    9    |c27  b27   3    | 8    6    1    |
 | 2    8    1    |c45   4-5  6    | 7    9    3    |
 | 7    3    6    | 189  19   189  | 4    2    5    |
 *--------------------------------------------------*
als xy-wing
(5=2)r2c5-(2=7)r7c5-(7r7c4=5r8c4)als:r678c4 => -5r8c5; stte
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Re: au tough November 24, 2012

Postby Marty R. » Sun Nov 25, 2012 5:35 pm

Interesting grid, to say the least.

Code: Select all
+-------+-------------+-------+
| 9 2 3 | 167 167 17  | 5 4 8 |
| 6 4 8 | 3   25  25  | 9 1 7 |
| 1 7 5 | 489 49  489 | 2 3 6 |
+-------+-------------+-------+
| 3 9 2 | 15  8   15  | 6 7 4 |
| 5 1 4 | 679 679 79  | 3 8 2 |
| 8 6 7 | 24  3   24  | 1 5 9 |
+-------+-------------+-------+
| 4 5 9 | 27  27  3   | 8 6 1 |
| 2 8 1 | 45  45  6   | 7 9 3 |
| 7 3 6 | 189 19  189 | 4 2 5 |
+-------+-------------+-------+

Play this puzzle online at the Daily Sudoku site

XY-Chain
(4=5)r8c4-r4c4=r4c6-(5=2)r2c6-(2=4)r6c6=>r6c4<>4
Last edited by Marty R. on Sun Nov 25, 2012 10:11 pm, edited 1 time in total.
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Re: au tough November 24, 2012

Postby Leren » Sun Nov 25, 2012 8:35 pm

Marty wrote:
XY-Chain
(4=5)r8c4-r4c5=r4c6-(5=2)r2c6-(2=4)r6c6=>r6c4<>4


Hi Marty, looks like theres a typo in your XY chain - should the second term be -r4c4 ?

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Re: au tough November 24, 2012

Postby Marty R. » Sun Nov 25, 2012 10:13 pm

Hi Marty, looks like theres a typo in your XY chain - should the second term be -r4c4 ?


Yep, definitely a typo. Thanks; it's been corrected.
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