The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |3..|...|..9|
 |..1|563|7..|
 |..8|1.7|6..|
 |---+---+---|
 |.8.|.3.|.4.|
 |4..|...|..5|
 |.7.|.1.|.6.|
 |---+---+---|
 |..9|7.1|4..|
 |..4|952|3..|
 |7..|...|..1|
 *-----------*


Play/Print this puzzle online

[JC Van Hay]

Solving the box 3 ...

Code: Select all

+------------------+--------------+----------------+
| 3     6      7   | 48   2  48   | 5    1      9  |
| (29)  24(9)  1   | 5    6  3    | 7    -2(8)  48 |
| 25    245    8   | 1    9  7    | 6    23     34 |
+------------------+--------------+----------------+
| 1     8      256 | 26   3  59   | 29   4      7  |
| 4     2(9)   236 | 268  7  (89) | 1    3(89)  5  |
| 259   7      235 | 248  1  4589 | 289  6      38 |
+------------------+--------------+----------------+
| 6     3      9   | 7    8  1    | 4    5      2  |
| 8     1      4   | 9    5  2    | 3    7      6  |
| 7     25     25  | 3    4  6    | 89   (89)   1  |
+------------------+--------------+----------------+

Chain[5] : 8r2c8=89r59c8.r5c6-9r5c2=9r2c2-(9=2)r2c1 :=> r2c8=8;ste

[pjb]

Similar chain, different targets:

(2=9) r2c1 - r2c2 = r5c2 - (89=3) r5c68 - (3=2) r3c8 => r2c8, r3c12 <> 2; stte

Phil

[Leren]

Code: Select all

*--------------------------------------------------------------*
| 3     6     7      | 48    2     48     | 5     1     9      |
| 29    29-4  1      | 5     6     3      | 7     28   c48     |
| 25   a245   8      | 1     9     7      | 6     23    3-4    |
|--------------------+--------------------+--------------------|
| 1     8     256    | 26    3     59     | 29    4     7      |
| 4    b29    236    | 268   7    b89     | 1    b389   5      |
| 259   7     235    | 248   1     4589   | 289   6    c38     |
|--------------------+--------------------+--------------------|
| 6     3     9      | 7     8     1      | 4     5     2      |
| 8     1     4      | 9     5     2      | 3     7     6      |
| 7    a25    25     | 3     4     6      | 89    89    1      |
*--------------------------------------------------------------*

als xy-wing: (4=2) r39c2 - (2=3) r5c268 - (3=4) r26c9 => r2c2, r3c9 <> 4; stte

Leren

[ArkieTech]

Code: Select all

 *-----------------------------------------------------------*
 | 3     6     7     | 48    2     48    | 5     1     9     |
 | 29    249   1     | 5     6     3     | 7     28    48    |
 |a25    4-25  8     | 1     9     7     | 6    a23    34    |
 |-------------------+-------------------+-------------------|
 | 1     8     256   | 26    3     59    | 29    4     7     |
 | 4    c29    236   | 268   7    b89    | 1    b389   5     |
 | 259   7     235   | 248   1     4589  | 289   6     38    |
 |-------------------+-------------------+-------------------|
 | 6     3     9     | 7     8     1     | 4     5     2     |
 | 8     1     4     | 9     5     2     | 3     7     6     |
 | 7    c25    25    | 3     4     6     | 89    89    1     |
 *-----------------------------------------------------------*
 als xy-wing
(25=3)r3c18-(3=9)r5c68-(9=25)r59c2 => -25r3c2; ste

[tlanglet]

AUR(25)r369c123 SIS 4r3c2, 9r6c1, 3r6c3 => r6c9<>3
4r3c2-(4=3)r3c9;
||
9r6c1-(9=4)r2c189-(4=3)r3c9;
||
3r6c3;

[Marty R.]

Code: Select all

+-------------+------------+------------+
| 3   6   7   | 48  2 48   | 5   1   9  |
| 29  249 1   | 5   6 3    | 7   28  48 |
| 25  245 8   | 1   9 7    | 6   23  34 |
+-------------+------------+------------+
| 1   8   256 | 26  3 59   | 29  4   7  |
| 4   29  236 | 268 7 89   | 1   389 5  |
| 259 7   235 | 248 1 4589 | 289 6   38 |
+-------------+------------+------------+
| 6   3   9   | 7   8 1    | 4   5   2  |
| 8   1   4   | 9   5 2    | 3   7   6  |
| 7   25  25  | 3   4 6    | 89  89  1  |
+-------------+------------+------------+


Play this puzzle online at the Daily Sudoku site

Once again the thrill of victory eludes me and I suffer the agony of a two-stepper.

XY-Wing 28-9 with transport, pivot r2c8: (9=8)r9c8-(8=2)r2c8-(2=9)r2c1-r2c2=r5c2=>r5c8<>9
Type 4 UR 48 r16c46=>r6c46<>8

[Marty R.]

AUR(25)r369c123 SIS 4r3c2, 9r6c1, 3r6c3 => r6c9<>3
4r3c2-(4=3)r3c9;
||
9r6c1-(9=4)r2c189-(4=3)r3c9;
||
3r6c3;

Nice Ted, but isn't that more of an ADP rather than AUR?

[tlanglet]

AUR(25)r369c123 SIS 4r3c2, 9r6c1, 3r6c3 => r6c9<>3
4r3c2-(4=3)r3c9;
||
9r6c1-(9=4)r2c189-(4=3)r3c9;
||
3r6c3;

Nice Ted, but isn't that more of an ADP rather than AUR?

Marty, I am not sure about any notation these days. Some time in the past, I was told by "those who know" that a pattern with more than 4 cells of the same xy digits was still a UR. I am one of "those who bastardized" the notation by referring to the pattern as an AUR.

I have never seen a document that provides "THE" complete notational standard, and do not ever expect to do so in the future. If I have a notational goal today, it is simply to provide a notation that expresses the logic of my steps. If it looks like a duck, walks like a duck,and quacks like a duck, I may still call it a goose.

Ted

[Marty R.]

I was told by "those who know" that a pattern with more than 4 cells of the same xy digits was still a UR.

To quote Alice, this is getting “Curiouser and curiouser!”

[Luke]

Some time in the past, I was told by "those who know" that a pattern with more than 4 cells of the same xy digits was still a UR. I am one of "those who bastardized" the notation by referring to the pattern as an AUR.

Ted, I honestly have never heard that, but I'm forgetful. Please provide link.

I know for a fact you know a BUG-Lite when you see one

[DonM]

Some time in the past, I was told by "those who know" that a pattern with more than 4 cells of the same xy digits was still a UR. I am one of "those who bastardized" the notation by referring to the pattern as an AUR.

Ted, I honestly have never heard that, but I'm forgetful. Please provide link.

I know for a fact you know a BUG-Lite when you see one

When I saw what Ted wrote, I said, 'Uh-oh, this calls for Bug-Luke!'

[tlanglet]

I keep promising myself to not get involved in notational discussions because they seem to be a no-win situation but I continue to open my mouth and quack.

Did anyone else see that goose go by?

Ted