The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |.1.|.8.|.34|
 |...|...|.8.|
 |...|...|6.9|
 |---+---+---|
 |...|36.|.7.|
 |.4.|8..|...|
 |2..|...|8.5|
 |---+---+---|
 |.9.|..5|...|
 |3.5|.2.|7..|
 |..4|.91|..8|
 *-----------*


Play/Print this puzzle online

[Leren]

Code: Select all

*--------------------------------------------------------------*
| 69    1     269    | 29    8     7      | 5     3     4      |
| 49    5     3      | 29    14    6      | 12    8     7      |
|b48    7     28     | 5    c14    3      | 6    d12    9      |
|--------------------+--------------------+--------------------|
| 5     8     19     | 3     6     49     | 149   7     2      |
| 69-1  4     7      | 8     5     2      | 19   e16    3      |
| 2     3     69     | 1     7     49     | 8     46    5      |
|--------------------+--------------------+--------------------|
|a18    9     18     | 7     3     5      | 24    24    6      |
| 3     6     5      | 4     2     8      | 7     9     1      |
| 7     2     4      | 6     9     1      | 3     5     8      |
*--------------------------------------------------------------*

XY Wing with transport : (1=8) r7c1 - (8=4) r4c1 - (4=1) r3c5 - r3c8 = (1) r5c8 => - 1 r5c1; stte

Leren

[SteveG48]

Code: Select all

 *--------------------------------------------------*
 | 69   1   d269  | 29   8    7    | 5    3    4    |
 | 49   5    3    | 29   14   6    | 12   8    7    |
 | 48   7    28   | 5    14   3    | 6    12   9    |
 *----------------+----------------+----------------|
 | 5    8    1-9  | 3    6    49   |a149  7    2    |
 |c169  4    7    | 8    5    2    |b19   16   3    |
 | 2    3    69   | 1    7    49   | 8    46   5    |
 *----------------+----------------+----------------|
 | 18   9    18   | 7    3    5    | 24   24   6    |
 | 3    6    5    | 4    2    8    | 7    9    1    |
 | 7    2    4    | 6    9    1    | 3    5    8    |
 *--------------------------------------------------*


9r4c7 = r5c7 - r5c1 = 9r1c3[BUG+1] => -9 r4c3 ; stte

[pjb]

Code: Select all

 69      1       269    | 29     8      7      | 5      3      4     
 49      5       3      | 29     14     6      |a12     8      7     
 48      7      c28     | 5      14     3      | 6     b12     9     
------------------------+----------------------+---------------------
 5       8      e19     | 3      6      49     | 49-1   7      2     
 169     4       7      | 8      5      2      | 19     16     3     
 2       3       69     | 1      7      49     | 8      46     5     
------------------------+----------------------+---------------------
 18      9      d18     | 7      3      5      | 24     24     6     
 3       6       5      | 4      2      8      | 7      9      1     
 7       2       4      | 6      9      1      | 3      5      8     


(1=2)r2c7 - r3c8 = (2-8)r3c3 = (8-1)r7c3 = r4c3 => -1 r4c7; stte

Phil

[bat999]

Code: Select all

.----------------.--------------.--------------.
| a69   1  a29-6 | 29   8    7  |  5     3   4 |
| a49   5   3    | 29  b14   6  | b12    8   7 |
|  48   7   28   | 5    14   3  |  6    c12  9 |
:----------------+--------------+--------------:
|  5    8   19   | 3    6    49 |  149   7   2 |
|  169  4   7    | 8    5    2  |  19   c16  3 |
|  2    3  d69   | 1    7   d49 |  8    c46  5 |
:----------------+--------------+--------------:
|  18   9   18   | 7    3    5  |  24    24  6 |
|  3    6   5    | 4    2    8  |  7     9   1 |
|  7    2   4    | 6    9    1  |  3     5   8 |
'----------------'--------------'--------------'

(2=4)r1c13,r2c1 - (4=2)r2c57 - (2=4)r356c8 - (4=6)r6c36 => -6 r1c3; stte

[Marty R.]

Code: Select all

+-----------+----------+----------+
| 69  1 269 | 29 8  7  | 5   3  4 |
| 49  5 3   | 29 14 6  | 12  8  7 |
| 48  7 28  | 5  14 3  | 6   12 9 |
+-----------+----------+----------+
| 5   8 19  | 3  6  49 | 149 7  2 |
| 169 4 7   | 8  5  2  | 19  16 3 |
| 2   3 69  | 1  7  49 | 8   46 5 |
+-----------+----------+----------+
| 18  9 18  | 7  3  5  | 24  24 6 |
| 3   6 5   | 4  2  8  | 7   9  1 |
| 7   2 4   | 6  9  1  | 3   5  8 |
+-----------+----------+----------+


Play this puzzle online at the Daily Sudoku site

Almost the same as Phil.

(1=2)r2c7-(2=1)r3c8-(1=48)r3c15-(8=2691)r1346c3=> -1r4c7

[Marty R.]

Code: Select all

.----------------.--------------.--------------.
| a69   1  a29-6 | 29   8    7  |  5     3   4 |
| a49   5   3    | 29  b14   6  | b12    8   7 |
|  48   7   28   | 5    14   3  |  6    c12  9 |
:----------------+--------------+--------------:
|  5    8   19   | 3    6    49 |  149   7   2 |
|  169  4   7    | 8    5    2  |  19   c16  3 |
|  2    3  d69   | 1    7   d49 |  8    c46  5 |
:----------------+--------------+--------------:
|  18   9   18   | 7    3    5  |  24    24  6 |
|  3    6   5    | 4    2    8  |  7     9   1 |
|  7    2   4    | 6    9    1  |  3     5   8 |
'----------------'--------------'--------------'

(2=4)r1c13,r2c1 - (4=2)r2c57 - (2=4)r356c8 - (4=6)r6c36 => -6 r1c3; stte

Bat, you lost me again which is not very difficult to do. I can follow the notation OK but can't see where the 1st term has -6r1c3.

[Leren]

Marty R wrote : Bat, you lost me again which is not very difficult to do. I can follow the notation OK but can't see where the 1st term has -6r1c3.

Hi Marty, perhaps I can help you out. It makes more sense if you read the chain from right to left. What it amounts to is - 6 r6c3 ....... = 2 r1c3 = > - 6 r1c3 (I've reversed the chain order so it reads from left to right).

Leren

[Marty R.]

Marty R wrote : Bat, you lost me again which is not very difficult to do. I can follow the notation OK but can't see where the 1st term has -6r1c3.

Hi Marty, perhaps I can help you out. It makes more sense if you read the chain from right to left. What it amounts to is - 6 r6c3 ....... = 2 r1c3 = > - 6 r1c3 (I've reversed the chain order so it reads from left to right).

Leren

Leren, thanks. You know me, one answer leads to more confusion. Looking at your chain above, all I can see is -6r6c3 which means =6r1c3.

[Marty R.]

Code: Select all

+-----------+----------+----------+
| *69 1 269 | 29 8  7  | 5   3  4 |
| *49 5 3   | 29 14 6  | 12  8  7 |
| *48 7*28  | 5  14 3  | 6  *12 9 |
+-----------+----------+----------+
| 5   8 19  | 3  6  49 | 149 7  2 |
| 169 4 7   | 8  5  2  | 19 *16 3 |
| 2   3 69  | 1  7  49 | 8   46 5 |
+-----------+----------+----------+
| 18  9 18  | 7  3  5  | 24  24 6 |
| 3   6 5   | 4  2  8  | 7   9  1 |
| 7   2 4   | 6  9  1  | 3   5  8 |

Just practicing

ALS XZ Rule X=2, Z=6 (2=16)r35c8, (6=4892)b1p1479

[Ngisa]

Code: Select all

+-----------+----------+----------+
| 69  1 269 | 29 8  7  | 5   3  4 |
| 49  5 3   | 29 14 6  | 12  8  7 |
| 48  7 b28  | 5  14 3  | 6   a12 9 |
+-----------+----------+----------+
| 5   8 d19  | 3  6  49 | 149 7  2 |
| e169 4 7   | 8  5  2  | 19  6-1 3 |
| 2   3 69  | 1  7  49 | 8   46 5 |
+-----------+----------+----------+
| 18  9 c18  | 7  3  5  | 24  24 6 |
| 3   6 5   | 4  2  8  | 7   9  1 |
| 7   2 4   | 6  9  1  | 3   5  8 |
+-----------+----------+----------+


(1=2)r3c8-(2=8)r3c3-(8=1)r7c3-r4c3=(1)r5c1 => -1r5c8; stte

Clement

[bat999]

... you lost me again...

Hi
(2=4)r1c13,r2c1 - (4=2)r2c57 - (2=4)r356c8 - (4=6)r6c36
If r1c3=2 then r1c3<>6 obviously.
If r1c3<>2 then r6c3=6 through the chain.
=> -6 r1c3

[Marty R.]

... you lost me again...

Hi
(2=4)r1c13,r2c1 - (4=2)r2c57 - (2=4)r356c8 - (4=6)r6c36
If r1c3=2 then r1c3<>6 obviously.
If r1c3<>2 then r6c3=6 through the chain.
=> -6 r1c3

Thanks. I realize that I am hopeless when it comes to this type of stuff. I can't see where the 1st and last term work together to come to a conclusion. All I can see is if r1c3 is not 2, then r6c3=6. As to the 1st term , if it's not 2 then it's 69, leaving the possibility of =6.

Don't feel obligated to reply, as there's a limit as to how much I want to pester people. If I don't get it, then life will still go on.

[bat999]

... if it's not 2 then it's 69, leaving the possibility of =6...

If r1c3<>2 then r6c3=6 through the chain which would kill a 6 in r1c3,

[SteveG48]

Now that we've settled that, I'll confuse things some more (hopefully not really) by pointing out that what was written

(2=4)r1c13,r2c1 - (4=2)r2c57 - (2=4)r356c8 - (4=6)r6c36 => -6 r1c3; stte

could have been written

(6=4)r12c1 - (4=2)r2c57 - (2=4)r356c8 - (4=6)r6c36 => -6 r1c3; stte .

There was really no need to include r1c3 in the initial term.