The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |..4|6.9|2..|
 |...|8..|..7|
 |29.|...|.5.|
 |---+---+---|
 |..7|5.3|.4.|
 |..6|...|7..|
 |.3.|4.1|9..|
 |---+---+---|
 |.2.|...|.61|
 |4..|..6|...|
 |..3|9.5|8..|
 *-----------*


Play/Print this puzzle online

[Leren]

Code: Select all

*--------------------------------------------------------------*
| 378   57    4      | 6     35    9      | 2     1     38     |
| 36   d156  d15     | 8    e135   2      | 4     9     7      |
| 2     9    c18     | 137   134   47     | 6     5     38     |
|--------------------+--------------------+--------------------|
| 9     8     7      | 5     6     3      | 1     4     2      |
| 1     4     6      | 2     9     8      | 7     3     5      |
| 5     3     2      | 4     7     1      | 9     8     6      |
|--------------------+--------------------+--------------------|
| 78    2     9      | 37    348   47     | 5     6     1      |
| 4     157  b158    | 17   a8-12  6      | 3     27    9      |
| 67    167   3      | 9    f12    5      | 8     27    4      |
*--------------------------------------------------------------*

S Wing (18) with bi-value extension cell r9c5: (8) r8c5 = r8c3 - (8=1) r3c3 - r2c12 = r2c5 - (1) r89c5 = (2) r9c5 - (12=8) r8c5 => -12 r8c5; stte

Leren

[SteveG48]

XY-wing: pivot r8c4, r8c8, r9c5 => r9c8 <>2
XY-wing: pivot r8c3, r8c5, r2c3 => r2c4 <>1

[SteveG48]

S Wing (18) with bi-value extension cell r9c5: (8) r8c5 = r8c3 - (8=1) r3c3 - r2c12 = r2c5 - (1) r89c5 = (2) r9c5 - (12=8) r8c5 => -12 r8c5; stte

Leren

Leren, love your single move solutions.

S.

[Luke]

This time, BUG-Lite internal outs:

(1)r3c45=(8)r7c5-(8=12)r89c5 ==>r2c5<>1

Code: Select all

 *--------------------------------------------------*
 | 378  57   4    | 6    35   9    | 2    1    38   |
 | 36   156  15   | 8   -135  2    | 4    9    7    |
 | 2    9    18   |*37+1 *34+1 *47 | 6    5    38   |
 |----------------+----------------+----------------|
 | 9    8    7    | 5    6    3    | 1    4    2    |
 | 1    4    6    | 2    9    8    | 7    3    5    |
 | 5    3    2    | 4    7    1    | 9    8    6    |
 |----------------+----------------+----------------|
 | 78   2    9    |*37  *34+8 *47  | 5    6    1    |
 | 4    157  158  | 17   128  6    | 3    27   9    |
 | 67   167  3    | 9    12   5    | 8    27   4    |
 *--------------------------------------------------*

BUG-Lite (347)r37c456 ==>r2c5<>1
||
(1)r3c45
||
(8)r7c5-(8=12)r89c5

[Leren]

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

[JC Van Hay]

Code: Select all

+-------------------+----------------+-----------+
| 378  57     4     | 6    35     9  | 2  1   38 |
| 36   56(1)  5(1)  | 8    35(1)  2  | 4  9   7  |
| 2    9      -1(8) | 137  134    47 | 6  5   38 |
+-------------------+----------------+-----------+
| 9    8      7     | 5    6      3  | 1  4   2  |
| 1    4      6     | 2    9      8  | 7  3   5  |
| 5    3      2     | 4    7      1  | 9  8   6  |
+-------------------+----------------+-----------+
| 78   2      9     | 37   348    47 | 5  6   1  |
| 4    157    15(8) | 17   (128)  6  | 3  27  9  |
| 67   167    3     | 9    (12)   5  | 8  27  4  |
+-------------------+----------------+-----------+

8r3c3=8r8c3-(8=12)r89c5-1r2c5=1r2c23 :=> -1r3c3; ste

[pjb]

Code: Select all

378    57     4      | 6      35     9      | 2      1      38     
36     156    15     | 8      135    2      | 4      9      7     
2      9     a18     |b137    134    47     | 6      5      38     
---------------------+----------------------+---------------------
9      8      7      | 5      6      3      | 1      4      2     
1      4      6      | 2      9      8      | 7      3      5     
5      3      2      | 4      7      1      | 9      8      6     
---------------------+----------------------+---------------------
78     2      9      | 37     348    47     | 5      6      1     
4      157    15-8   |c17    d128    6      | 3      27     9     
67     167    3      | 9     d12     5      | 8      27     4     


(8=1) r3c3 - r3c4 = r8c4 - (1=8)r89c5 => -8 r8c3; stte

Phil

[SteveG48]

By general consensus, the aim of these Dan's Dailies threads is to find a single "advanced" move that will solve the puzzle.

Thanks, Leren. I was beginning to realize that. At my level of play, it will probably leave me out for awhile, but I'll see what I can do.

[tlanglet]

Code: Select all

 *--------------------------------------------------*
 |d378  57   4    | 6    35   9    | 2    1    38   |
 | 36   156  15   | 8   a135  2    | 4    9    7    |
 | 2    9   c18   |b137 a134  47   | 6    5    38   |
 |----------------+----------------+----------------|
 | 9    8    7    | 5    6    3    | 1    4    2    |
 | 1    4    6    | 2    9    8    | 7    3    5    |
 | 5    3    2    | 4    7    1    | 9    8    6    |
 |----------------+----------------+----------------|
 |e78   2    9    | 37   34-8 47   | 5    6    1    |
 | 4    157  15-8 | 17  *12=8 6    | 3    27   9    |
 | 67   167  3    | 9   *12   5    | 8    27   4    |
 *--------------------------------------------------*


ANP(8=12)r89c5-1r23c5=r3c4-(1=8)r3c3-r1c1=r7c1 =>r7c5,r8c3<>8

Ted

[Marty R.]

Code: Select all

378    57     4      | 6      35     9      | 2      1      38     
36     156    15     | 8      135    2      | 4      9      7     
2      9     a18     |b137    134    47     | 6      5      38     
---------------------+----------------------+---------------------
9      8      7      | 5      6      3      | 1      4      2     
1      4      6      | 2      9      8      | 7      3      5     
5      3      2      | 4      7      1      | 9      8      6     
---------------------+----------------------+---------------------
78     2      9      | 37     348    47     | 5      6      1     
4      157    15-8   |c17    d128    6      | 3      27     9     
67     167    3      | 9     d12     5      | 8      27     4     


(8=1) r3c3 - r3c4 = r8c4 - (1=8)r89c5 => -8 r8c3; stte

Phil

I'm almost always late to the party and often find that Phil and I played the same move and this was no exception.

[Luke]

I'm almost always late to the party and often find that Phil and I played the same move and this was no exception.

While they all might look different, upon closer examination, I'd say we ALL played the same move this time around

[SteveG48]

By general consensus, the aim of these Dan's Dailies threads is to find a single "advanced" move that will solve the puzzle.

Another question. I've been assuming that solutions should be found without computer aid. Is that right? If not, what level of computer involvement is considered appropriate?

Are X-wings considered excluded basic fish?

[Leren]

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

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.

Leren

[Luke]

Another question. I've been assuming that solutions should be found without computer aid. Is that right? If not, what level of computer involvement is considered appropriate?

Since you brought it up, I personally support the use of programs as a "front end" so I can play around with a puzzle on my devices rather than paper and pencil. After that, I am FAR more interested in how a human would solve these puzzles than any computer program. If the human solution matches the output of a program, that's cool too.

Even so, I'm interested in what a program might offer. It's a good way to learn. Maybe not in the first 10 minutes of the presentation of a new grid, but eventually.

I support a happy medium. I'd like to see those posting content other than their own take a cue from daj95376, who always differentiates in writing between his own work and that of his solver. Best of both worlds.

Or not. People can do what they want. We all have our own agendas and nothing is right or wrong.