The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |...|...|...|
 |67.|...|.31|
 |381|...|6..|
 |---+---+---|
 |8..|2..|3..|
 |...|3.6|...|
 |...|.19|..4|
 |---+---+---|
 |..4|.5.|216|
 |29.|...|.48|
 |...|...|...|
 *-----------*


Play/Print this puzzle online

[SteveG48]

Code: Select all

 *--------------------------------------------------------------------*
 | 49     245    259    | 16     36     13     | 5789   5789   579    |
 | 6      7      9-5    |b58     89     2      | 4      3      1      |
 | 3      8      1      | 457    79     47     | 6      259    259    |
 *----------------------+----------------------+----------------------|
 | 8      1      679    | 2      4      5      | 3      679    79     |
 | 49     24     279    | 3      78     6      | 1      25789  2579   |
 | 5      26     3      |b78     1      9      | 78     26     4      |
 *----------------------+----------------------+----------------------|
 | 7      3      4      | 9      5      8      | 2      1      6      |
 | 2      9     a56     |a167   a36    a13     | 57     4      8      |
 | 1      56     8      | 467    2      47     | 579    579    3      |
 *--------------------------------------------------------------------*


(5=7)r8c3456 - (7=5)r26c4 => -5 r2c3 ; stte

[Leren]

Code: Select all

*--------------------------------------------------------------*
| 49    245   259    | 16    36    13     | 5789  5789  579    |
| 6     7    d59     |e58    89    2      | 4     3     1      |
| 3     8     1      | 457   79    47     | 6     259   259    |
|--------------------+--------------------+--------------------|
| 8     1     679    | 2     4     5      | 3     679   79     |
| 49    24    279    | 3     78    6      | 1     25789 2579   |
| 5     26    3      |f8-7   1     9      | 78    26    4      |
|--------------------+--------------------+--------------------|
| 7     3     4      | 9     5     8      | 2     1     6      |
| 2     9    c56     |a167   36    13     |b57    4     8      |
| 1     56    8      | 467   2     47     | 579   579   3      |
*--------------------------------------------------------------*

(7) r8c4 = (7-5) r8c7 = r8c3 - r2c3 = (5-8) r2c4 = (8) r6c4 => - 7 r6c4; stte

Leren

[StrmCkr]

Code: Select all

000000000670002431381000600810245300000306100503019004734958216290000048108020003

+--------------+-----------------+-----------------+
| 49  245  259 | 16   36    13   | 89  5789   57   |
| 6   7    59  | 58   89    2    | 4   3      1    |
| 3   8    1   | 45   (79)  4(7) | 6   25(9)  25   |
+--------------+-----------------+-----------------+
| 8   1    679 | 2    4     5    | 3   67     79   |
| 49  24   279 | 3    78    6    | 1   2578   2579 |
| 5   26   3   | 78   1     9    | 78  26     4    |
+--------------+-----------------+-----------------+
| 7   3    4   | 9    5     8    | 2   1      6    |
| 2   9    56  | 167  36    13   | 57  4      8    |
| 1   56   8   | 46   2     4(7) | 59  -9(7)  3    |
+--------------+-----------------+-----------------+

i used basics to get to here then....
a fancy purple cow : stte

Two [41,92] 6 Candidates,
3 Truths = {7R39 9R3}
4 Links = {7c6 9c8 3n5 9n8}
1 Elimination --> r9c8<>9

[Leren]

StrmCkr wrote: i used basics to get to here

Your post basics PM differs from mine and Steve's in boxes 2,3,6 and 9

Leren

[StrmCkr]

yeah, you both miss the x-wing on R68C47
or ER/ 2-string kite...

as far as i know the er 2string kites don't function in ss, but the x wing sure will.

a ?? if the next finned x-wing is in ss or not as i don't recall.
then a xy-wing

which puts me at the grid you seen above and my solution.

[SteveG48]

yeah, you both miss the x-wing on R68C47

Yes, there are differences of opinion on whether or not x-wings should be considered "basic" moves. For the purpose of these daily puzzles, we generally agree not to consider them basics.

[Ngisa]

Code: Select all

+------------+--------------+-----------------+
| 49 245 259 | 1567 3679 13 | 5789 25789 2579 |
| 6  7   9-5  | h58   g89   2  | 4    3     1    |
| 3  8   1   | 457  f79   e47 | 6    2579  2579 |
+------------+--------------+-----------------+
| 8  1   679 | 2    4    5  | 3    679   79   |
| 49 24  279 | 3    78   6  | 1    25789 2579 |
| 5  26  3   | 78   1    9  | 78   26    4    |
+------------+--------------+-----------------+
| 7  3   4   | 9    5    8  | 2    1     6    |
| 2  9   a56  | 167  367  13 | b57   4     8    |
| 1  56  8   | 467  267  d47 | c579  c579   3    |
+------------+--------------+-----------------+


(5)r8c3=r8c7-(5=7)r9c78-(7=4)r9c6-(4=7)r3c6-(7=9)r3c5-(9=8)r2c5-(8=5)r2c4 => -5r2c3; stte.

[StrmCkr]

Ah, we'll for the longest time most off us that solved stuff on the forum used a standard reference point. That standard was simple sudoku as the guide set for what was basic.. However if you have agreed to a different set list pls point to it

[SteveG48]

Ah, we'll for the longest time most off us that solved stuff on the forum used a standard reference point. That standard was simple sudoku as the guide set for what was basic.. However if you have agreed to a different set list pls point to it

This what I was told when I first came here:

Hi Steve,

By general consensus, the aim of these Dan's Dailies threads is to find a single "advanced" move that will solve the puzzle. The move can be preceded by "basics", where these are defined as singles, intersect/reject, naked or hidden pairs triples and quads. For some reason basic fish are not included in basics. Finned, franken, mutant etc fish would count as the advanced move. The advanced move can be followed by more basics to complete the puzzle but would preferably be followed singles only. The advanced move will generally be some sort of AIC with 3 - 5 Strong links, an ALS XZ or ALS XY Wing. Some solvers like to use uniqueness or avoidable patterns to create one of the Strong links.

Leren
Leren Posts: 1242Joined: 02 June 2012

and:

Steve G48 wrote: Are X-wings considered excluded basic fish?

Leren wrote:
Unfinned XWings, Swordfish and Jellyfish would be excluded from basics. I'm not sure what the reasoning is - perhaps it produces a wider ''Goldilocks" zone of puzzles that can be solved by a single advanced move but aren't considered too easy for experienced solvers. Maybe the experts with more knowledge of the history of this forum can comment.

LerenLeren Posts: 1242Joined: 02 June 2012

These are from the thread "Dan's Decline, November 24, 2013".

[ArkieTech]

I consider "basics" as locked cells and sets only.

[Leren]

The previous standard that I think StrmCkr is referring to is SSTS - Simple Sudoku Techique Set. This is defined at the Sudopedia mirror site as :

SSTS means Simple Sudoku Technique Set, the set of solving techniques implemented in the Simple Sudoku program.

Because this set has not changed since 2005, it is often used as a benchmark. Some solvers use SSTS in their solving path description to identify the "easy" parts not worth mentioning between the advanced steps.

The set contains the following techniques -- listed by SS hierarchy:

Naked Single, Hidden Single, Naked Pair, Locked Candidates, Naked Triple, Naked Quad, Hidden Pair, X-Wing, Swordfish, Simple Colors, Multi-Colors, Hidden Triple, XY-Wing, Hidden Quad.

This list is what we currently refer to as basics plus X-Wing, Swordfish, Simple Colors, Multi-Colors and XY Wing.

If you use SSTS then todays puzzle would be completely solvable, using basics + 1 X Wing on 7 + Simple coloring on 5.

In other words, using SSTS as a basic set of moves there would be no "advanced" move required to solve the puzzle !!!!!! ie nobody would respond because there would be nothing to respond to.

If you wanted to revert to SSTS as a basic set of moves then Dan would have to raise the rating of the daily puzzles.

Leren

[StrmCkr]

Code: Select all

.--------------.-------------.-------------------.
| 49  245  259 | 16   36  13 | 5789  5789   579  |
| 6   7    59  | 58   89  2  | 4     3      1    |
| 3   8    1   | 457  79  47 | 6     259    259  |
:--------------+-------------+-------------------:
| 8   1    679 | 2    4   5  | 3     679    79   |
| 49  24   279 | 3    78  6  | 1     25789  2579 |
| 5   26   3   | 78   1   9  | 78    26     4    |
:--------------+-------------+-------------------:
| 7   3    4   | 9    5   8  | 2     1      6    |
| 2   9    56  | 167  36  13 | 57    4      8    |
| 1   56   8   | 467  2   47 | 579   579    3    |
'--------------'-------------'-------------------'

Death Blossom: [r6c4], -7- r8c3456 {13567}, -8- r2c4 {58} => r2c3<>5: stte