The New Sudoku Players' Forum

[Plattso]

Starts here.

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.2..4.....98.5.3.2..4..8.....13....4.45...71.7....59.....5..2..4.9.7.16.....9..3.



I get it to here...

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 *----------------------------------------------------------------------------------------------*
 | 1356      2         367       | 169       4         39        | 568       5789      16789    |
 | 16        9         8         | 7         5         16        | 3         4         2        |
 | 1356      13567     4         | 1269      236       8         | 56        579       1679     |
 |-------------------------------+-------------------------------+------------------------------|
 | 9         68        1         | 3         268       7         | 568       258       4        |
 | 2368      4         5         | 2689      268       29        | 7         1         368      |
 | 7         368       236       | 4         1         5         | 9         28        368      |
 |-------------------------------+-------------------------------+------------------------------|
 | 1368      13678     367       | 5         368       4         | 2         789       789      |
 | 4         358       9         | 28        7         23        | 1         6         58       |
 | 2568      5678      267       | 168       9         16        | 4         3         578      |
 *----------------------------------------------------------------------------------------------*



There sure are a bunch of sixes. I know I'm missing something.
Why don't you folks show me some ALS's or Chained Finned Freakazoids
or something.

I'm going to be embarrassed, I know. It'll be something simple.
But this was useful to get my solver-helper all outputted in the right format & stuff.

My helper's written in AWK, by the way. I've almost got it doing all the simple stuff.

Also, which of the two box-line-type interactions is by convention known as "pointing"? Is that the "Box-Line", or "Line-Box"?

[Pat]

.2..4.....98.5.3.2..4..8.....13....4.45...71.7..5..2..4.9.7.16.....9..3.

please show 81 cells of original puzzle.

I get it to here...

Code: Select all

 *-----------------------------------------------------*
 | 1356 2     367  | 169  4    39   | 568  5789  16789 |
 | 16   9     8    | 7    5    16   | 3    4     2     |
 | 1356 13567 4    | 1269 236  8    | 56   579   1679  |
 |-----------------+----------------+------------------|
 | 9    68    1    | 3    268  7    | 568  258   4     |
 | 2368 4     5    | 2689 268  29   | 7    1     368   |
 | 7    368   236  | 4    1    5    | 9    28    368   |
 |-----------------+----------------+------------------|
 | 1368 13678 367  | 5    368  4    | 2    789   789   |
 | 4    358   9    | 28   7    23   | 1    6     58    |
 | 2568 5678  267  | 168  9    16   | 4    3     578   |
 *-----------------------------------------------------*



you may need some Forcing Chains.

which of the two box-line interactions is known as "pointing"? Is that the "Box-Line", or "Line-Box"?

box-to-line exclusion -- sometimes called "Pointing"
line-to-box exclusion -- sometimes called "Claiming"
try the SuDoPedia

[Plattso]

There, I think I've successfully edited that string.

Thank you very much.

- WCP

[ravel]

Code: Select all

 *--------------------------------------------------------*
 | 1356  2      367  | 169   4   B39  | 568  5789  16789  |
 | 16    9      8    | 7     5    16  | 3    4     2      |
 | 1356  1567   4    | 1269  2-36 8   | 56   579   1679   |
 |-------------------+----------------+-------------------|
 | 9     68     1    | 3    A268  7   | 568  258   4      |
 | 2368  4      5    | 2689 A268 B29  | 7    1     368    |
 | 7     368    236  | 4     1    5   | 9    28    368    |
 |-------------------+----------------+-------------------|
 | 1368  13678  367  | 5    A368  4   | 2    789   789    |
 | 4     358    9    | 28    7    2-3 | 1    6     58     |
 | 2568  5678   267  | 168   9    16  | 4    3     578    |
 *--------------------------------------------------------*


You can solve it with an ALS xz, A={2368} in r457c5, B={239} in r15c6, x=2, z=3:
A 3 in r3c5 or r8c6 would lock the 2 in A to r45c4, in B to r5c6.

[Plattso]

Dang it, of course.

r8c6 cannot be 3 same time there's a naked pair (6,8) in box 5
pointing down looking at r7c5. Now that makes sense.

[re'born]

Code: Select all

 *--------------------------------------------------------*
 | 1356  2      367  | 169   4   B39  | 568  5789  16789  |
 | 16    9      8    | 7     5    16  | 3    4     2      |
 | 1356  1567   4    | 1269  2-36 8   | 56   579   1679   |
 |-------------------+----------------+-------------------|
 | 9     68     1    | 3    A268  7   | 568  258   4      |
 | 2368  4      5    | 2689 A268 B29  | 7    1     368    |
 | 7     368    236  | 4     1    5   | 9    28    368    |
 |-------------------+----------------+-------------------|
 | 1368  13678  367  | 5    A368  4   | 2    789   789    |
 | 4     358    9    | 28    7    2-3 | 1    6     58     |
 | 2568  5678   267  | 168   9    16  | 4    3     578    |
 *--------------------------------------------------------*


You can solve it with an ALS xz, A={2368} in r457c5, B={239} in r15c6, x=2, z=3:
A 3 in r3c5 or r8c6 would lock the 2 in A to r45c4, in B to r5c6.

A slightly smaller variant of this is A={2368} in r457c5, B = {23} in r8c5, x = 3, z = 2. This implies r5c6<>2, solving the puzzle.

[daj95376]

Plattso,

Original PM contains elimination [r3c2]<>3. It can be performed with: Colors, Empty Rectangle, or 2-String Kite. I don't think this elimination is important to reach a solution, but its presence may be of interest to you.

[Plattso]

Plattso,

Original PM contains elimination [r3c2]<>3.... may be of interest to you.

Got it. That's cool. r3c2=3 leads to contradiction on the 3board.

Thanks