The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |6..|.8.|...|
 |..1|...|.6.|
 |4..|..9|351|
 |---+---+---|
 |5..|.36|..9|
 |...|.4.|...|
 |2..|19.|..3|
 |---+---+---|
 |829|3..|..5|
 |.4.|...|8..|
 |...|.1.|..7|
 *-----------*


Play/Print this puzzle online

[pjb]

Code: Select all

 6       3579    235    | 25-7   8      1      | 279    279    4     
b79     b579     1      | 4     c257    3      | 279    6      8     
 4      b78     a28     | 6    ac27     9      | 3      5      1     
------------------------+----------------------+---------------------
 5       178     48     | 278    3      6      | 1247   12478  9     
 79      136789  368    | 2578   4      2578   | 12567  1278   26     
 2       678     468    | 1      9      578    | 4567   478    3     
------------------------+----------------------+---------------------
 8       2       9      | 3      6-7    47     | 146    14     5     
 1       4       7      | 9      256    25     | 8      3      26     
 3       56      56     | 28     1      248    | 249    249    7     


(7=8)r3c35 - (8=5)r3c2,r2c12 - (5=27)r23c5 => -7 r1c4, r7c5; stte

Phil

Thanks daj95376 for pointing out yet another typo

[SteveG48]

Code: Select all

 *-----------------------------------------------------------------------------*
 | 6       3579    235     | 257     8       1       | 279     279     4       |
 |c79     c579     1       | 4      b257     3       | 279     6       8       |
 | 4      c78     c28      | 6      d27      9       | 3       5       1       |
 *-------------------------+-------------------------+-------------------------|
 | 5       178     48      | 278     3       6       | 1247    12478   9       |
 | 79      136789  368     | 2578    4       2578    | 12567   1278    26      |
 | 2       678     468     | 1       9       578     | 4567    478     3       |
 *-------------------------+-------------------------+-------------------------|
 | 8       2       9       | 3      d67      47      | 146     14      5       |
 | 1       4       7       | 9      a25-6    25      | 8       3       26      |
 | 3       56      56      | 28      1       248     | 249     249     7       |
 *-----------------------------------------------------------------------------*


(5)r8c5 = r2c5 - (5=7892)b1p4589 - (2=76)r37c5 => -6 r8c5 ; stte

[Leren]

Code: Select all

*--------------------------------------------------------------*
| 6     3579  235    | 257   8     1      | 279   279   4      |
|b79   b579   1      | 4    c257   3      | 279   6     8      |
| 4    b78   b28     | 6   ca27    9      | 3     5     1      |
|--------------------+--------------------+--------------------|
| 5     178   48     | 278   3     6      | 1247  12478 9      |
| 79    13678 368    | 2578  4     2578   | 12567 1278  26     |
| 2     678   468    | 1     9     578    | 4567  478   3      |
|--------------------+--------------------+--------------------|
| 8     2     9      | 3   ca67    47     | 14-6  14    5      |
| 1     4     7      | 9     25-6  25     | 8     3     26     |
| 3     56    56     | 28    1     248    | 249   249   7      |
*--------------------------------------------------------------*

ALS XY Wing: (6=2) r37c5 - (2=5) r2c12, r3c23 - (5=6) r237c5 => - 6 r8c5, r7c7; stte

Leren

[Leren]

SteveG48 wrote ; (5)r7c5 = r2c5 - (5=7892)b1p4589 - (2=76)r37c5 => -6 r8c5

Typo : (5) r8c5 .....

Also it's a bit confusing. It reads better from right to left. If it was me I'd reverse it.

Leren

[daj95376]

Code: Select all

 6       3579    235    | 25-7   8      1      | 279    279    4     
b79     b579     1      | 4     c257    3      | 279    6      8     
 4      b78     a28     | 6     a27     9      | 3      5      1     
------------------------+----------------------+---------------------
 5       178     48     | 278    3      6      | 1247   12478  9     
 79      136789  368    | 2578   4      2578   | 12567  1278   26     
 2       678     468    | 1      9      578    | 4567   478    3     
------------------------+----------------------+---------------------
 8       2       9      | 3      6-7    47     | 146    14     5     
 1       4       7      | 9      256    25     | 8      3      26     
 3       56      56     | 28     1      248    | 249    249    7     


(7=8)r3c35 - (8=5)r3c2,r2c12 - r2c5 => -7 r1c4, r7c5; stte

I believe that you meant:

(7=8)r3c35 - (8=5)r3c2,r2c12 - (5=27)r23c5 => -7 r1c4, r7c5; stte

[JC Van Hay]

Code: Select all

+-----------------+-------------------+------------------+
| 6   3579    235 | 25-7  8      1    | 29(7)  29(7)  4  |
| 79  579     1   | 4     57(2)  3    | 9(27)  6      8  |
| 4   78      28  | 6     (27)   9    | 3      5      1  |
+-----------------+-------------------+------------------+
| 5   178     48  | 278   3      6    | 1247   12478  9  |
| 79  136789  368 | 2578  4      2578 | 12567  1278   26 |
| 2   678     468 | 1     9      578  | 4567   478    3  |
+-----------------+-------------------+------------------+
| 8   2       9   | 3     67     47   | 146    14     5  |
| 1   4       7   | 9     256    25   | 8      3      26 |
| 3   56      56  | 28    1      248  | 249    249    7  |
+-----------------+-------------------+------------------+
[(7=2)r3c5 - 2r2c5=(2-7)r2c7=7r1c78] - 7r1c4

[SteveG48]

SteveG48 wrote ; (5)r7c5 = r2c5 - (5=7892)b1p4589 - (2=76)r37c5 => -6 r8c5

Typo : (5) r8c5 .....

Also it's a bit confusing. It reads better from right to left. If it was me I'd reverse it.

Leren

Thanks, Leren. Typo fixed.

It seems to me to read pretty much the same from left to right or right to left. Maybe I'm missing something.

[ronk]

Code: Select all

(5)r8c5 = r2c5 - (5=7892)b1p4589 - (2=76)r37c5 => -6 r8c5 ; stte

The "b..p.." notation is considerably more confusing to me than the direction the chain is written, especially when the four cells in box 1 are easily split into two ALSs in two different rows.

(5)r8c5 = r2c5 - (5=97)r2c12 - (7=82)r3c23 -(2=76)r3c57 ==> r8c5<>6

[SteveG48]

Code: Select all

(5)r8c5 = r2c5 - (5=7892)b1p4589 - (2=76)r37c5 => -6 r8c5 ; stte

The "b..p.." notation is considerably more confusing to me than the direction the chain is written, especially when the four cells in box 1 are easily split into two ALSs in two different rows.

(5)r8c5 = r2c5 - (5=97)r2c12 - (7=82)r3c23 -(2=76)r3c57 ==> r8c5<>6

Mmm. I've been using the b..p notation for sets confined to a single box, but not to a single row or column. Admittedly, this one could be split, but that's not necessarily a reason why it should be. So far the limited reviews for the notation have been favorable, but now we have an opposing opinion. Anyone else want to weigh in? The purpose of good notation to my way of thinking is to communicate results clearly. If folks find the notation confusing, that would be a good reason for me to drop it.

[ArkieTech]

Code: Select all

(5)r8c5 = r2c5 - (5=7892)b1p4589 - (2=76)r37c5 => -6 r8c5 ; stte

The "b..p.." notation is considerably more confusing to me than the direction the chain is written, especially when the four cells in box 1 are easily split into two ALSs in two different rows.

(5)r8c5 = r2c5 - (5=97)r2c12 - (7=82)r3c23 -(2=76)r3c57 ==> r8c5<>6

Mmm. I've been using the b..p notation for sets confined to a single box, but not to a single row or column. Admittedly, this one could be split, but that's not necessarily a reason why it should be. So far the limited reviews for the notation have been favorable, but now we have an opposing opinion. Anyone else want to weigh in? The purpose of good notation to my way of thinking is to communicate results clearly. If folks find the notation confusing, that would be a good reason for me to drop it.

I like simple and the b..p notation. A single cell can always be located with row column. A set cannot, without confusing commas or other complications.