Dan's Dichroism November 7, 2013

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Dan's Dichroism November 7, 2013

Postby ArkieTech » Thu Nov 07, 2013 12:19 am

Code: Select all
 *-----------*
 |.17|3..|5..|
 |.6.|5.2|.1.|
 |...|.8.|...|
 |---+---+---|
 |..6|..5|2.1|
 |4..|...|..9|
 |1.2|9..|6..|
 |---+---+---|
 |...|.1.|...|
 |.5.|7.6|.2.|
 |..9|..4|17.|
 *-----------*


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Re: Dan's Dichroism November 7, 2013

Postby Leren » Thu Nov 07, 2013 12:49 am

Code: Select all
*---------------------------------------------------------------*
|a28     1     7      | 3     6     9      | 5     4     28     |
| 89     6    b38     | 5     4     2      | 389   1     7      |
| 5      49-2 34      | 1     8     7      | 39    69    26     |
|---------------------+--------------------+--------------------|
| 3789   3789  6      | 4     37    5      | 2     38    1      |
| 4      38    5      | 6     2     1      | 7     38    9      |
| 1      37    2      | 9     37    8      | 6     5     4      |
|---------------------+--------------------+--------------------|
| 678-2  2478 c48     | 28    1     3      | 89    69    5      |
|d38     5     1      | 7     9     6      | 4     2     38     |
| 368-2 d238   9      | 28    5     4      | 1     7     368    |
*---------------------------------------------------------------*

ALS W Wing: (2=8) r1c1 - r2c3 = r7c3 - (8=2) r8c1,r9c2 => - 2 r3c2, r79c1; stte

Code: Select all
*---------------------------------------------------------------*
|a28     1     7      | 3     6     9      | 5     4    b28     |
|a89     6     38     | 5     4     2      | 389   1     7      |
| 5      249   34     | 1     8     7      | 39    69    26     |
|---------------------+--------------------+--------------------|
|a3789   389-7 6      | 4     37    5      | 2     38    1      |
| 4      38    5      | 6     2     1      | 7     38    9      |
| 1      3-7   2      | 9     37    8      | 6     5     4      |
|---------------------+--------------------+--------------------|
| 268-7 c2478 c48     |c28    1     3      |c89   c69    5      |
|a38     5     1      | 7     9     6      | 4     2    b38     |
| 2368   238   9      | 28    5     4      | 1     7    b368    |
*---------------------------------------------------------------*

ALS XY Wing: (7=2) r1248c1 - (2=6) r189c9 - (6=7) r7c23478 => - 7 r46c2, r7c1; stte

dichroism:

1. A property of a uniaxial crystal, such as tourmaline, of showing a perceptible difference in colour when viewed along two different axes in transmitted white light.
2. A property of certain solutions as a result of which the wavelength (colour) of the light transmitted depends on the concentration of the solution and the length of the path of the light within the solution.

I think Dan was suggesting that I should view the puzzle in more than one way, to bring out it's different properties - which is why I posted 2 different solutions.

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Re: Dan's Dichroism November 7, 2013

Postby Ngisa » Thu Nov 07, 2013 4:58 pm

Another is a multi-step solution
Code: Select all
+--------------+---------+------------+
| 28   1    7  | 3  6  9 | 5   4  28  |
| 89   6    38 | 5  4  2 | 389 1  7   |
| 5    249  34 | 1  8  7 | 39  69 26  |
+--------------+---------+------------+
| 3789 3789 6  | 4  37 5 | 2   38 1   |
| 4    38   5  | 6  2  1 | 7   38 9   |
| 1    37   2  | 9  37 8 | 6   5  4   |
+--------------+---------+------------+
| 2678 2478 48 | 28 1  3 | 89  69 5   |
| 38   5    1  | 7  9  6 | 4   2  38  |
| 2368 238  9  | 28 5  4 | 1   7  368 |
+--------------+---------+------------+
X-Wing on 8 in row 18; r2479c1<>8, r9c9<>8 followed by
Type 1 UR 38 in r45c28; r4c2<>38 and UR 37 in r46c25; r4c2<>37 leading to
BUG+1; r9c9=3; stte.
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Re: Dan's Dichroism November 7, 2013

Postby Marty R. » Thu Nov 07, 2013 5:19 pm

Code: Select all
+--------------+---------+------------+
| 28   1    7  | 3  6  9 | 5   4  28  |
| 89   6    38 | 5  4  2 | 389 1  7   |
| 5    249  34 | 1  8  7 | 39  69 26  |
+--------------+---------+------------+
| 3789 3789 6  | 4  37 5 | 2   38 1   |
| 4    38   5  | 6  2  1 | 7   38 9   |
| 1    37   2  | 9  37 8 | 6   5  4   |
+--------------+---------+------------+
| 2678 2478 48 | 28 1  3 | 89  69 5   |
| 38   5    1  | 7  9  6 | 4   2  38  |
| 2368 238  9  | 28 5  4 | 1   7  368 |
+--------------+---------+------------+

Play this puzzle online at the Daily Sudoku site

I did it the old-fashioned way in lieu of searching for chains.

1) X-Wing (8), c37
2) XY-Wing (38-2), pivot r8c1
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Re: Dan's Dichroism November 7, 2013

Postby Marty R. » Thu Nov 07, 2013 8:14 pm

dichroism:

1. A property of a uniaxial crystal, such as tourmaline, of showing a perceptible difference in colour when viewed along two different axes in transmitted white light.
2. A property of certain solutions as a result of which the wavelength (colour) of the light transmitted depends on the concentration of the solution and the length of the path of the light within the solution.


It's said that if you use a new word in a sentence three times it becomes part of your vocabulary. ;)

I think Dan was suggesting that I should view the puzzle in more than one way, to bring out it's different properties -


Do you really think he's that subtle? :lol:
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Re: Dan's Dichroism November 7, 2013

Postby Leren » Thu Nov 07, 2013 11:43 pm

Marty R wrote: Do you really think he's that subtle?

In keeping with the fun aspect of the daily d word and my warped sense of humor I try to "read" an implied hint into it and find a solution to suit.

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Re: Dan's Dichroism November 7, 2013

Postby ArkieTech » Fri Nov 08, 2013 12:45 am

Marty R. wrote:Do you really think he's that subtle? :lol:


;)
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Re: Dan's Dichroism November 7, 2013

Postby SteveG48 » Sat Nov 09, 2013 12:15 am

X-wing on 8's, R18C19;
XY-wing R1C1, R8C2, pivot R7C1 removing 2 at R3C2
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