The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |..1|...|3..|
 |.9.|6.1|.5.|
 |.85|...|91.|
 |---+---+---|
 |.1.|.7.|.9.|
 |...|.6.|...|
 |...|2.3|...|
 |---+---+---|
 |9..|...|..5|
 |2.6|7.9|4.1|
 |...|.2.|...|
 *-----------*


Play/Print this puzzle online

[Leren]

Code: Select all

*--------------------------------------------------------------*
| 467   26    1      | 5     9     27     | 3     2467  8      |
| 347   9    a23     | 6     8     1      | 7-2   5    c247    |
| 67    8     5      | 34    34    27     | 9     1    c267    |
|--------------------+--------------------+--------------------|
| 36    1    b23     | 48    7     458    | 58    9    b26     |
| 58    247   47     | 9     6     58     | 1     247   3      |
| 58    467   9      | 2     1     3      | 58    467  c467    |
|--------------------+--------------------+--------------------|
| 9     47    478    | 1     34    468    | 267   237   5      |
| 2     3     6      | 7     5     9      | 4     8     1      |
| 1     5     478    | 348   2     468    | 67    37    9      |
*--------------------------------------------------------------*

ALS XY Wing: (2=3) r2c3 - (3=6) r4c39 - (6=2) r236c9 => - 2 r2c7; stte

Leren

[Marty R.]

Code: Select all

+-------------+------------+--------------+
| 467 26  1   | 5   9  27  | 3   2467 8   |
| 347 9   23  | 6   8  1   | 27  5    247 |
| 67  8   5   | 34  34 27  | 9   1    267 |
+-------------+------------+--------------+
| 36  1   23  | 48  7  458 | 58  9    26  |
| 58  247 47  | 9   6  58  | 1   247  3   |
| 58  467 9   | 2   1  3   | 58  467  467 |
+-------------+------------+--------------+
| 9   47  478 | 1   34 468 | 267 237  5   |
| 2   3   6   | 7   5  9   | 4   8    1   |
| 1   5   478 | 348 2  468 | 67  37   9   |
+-------------+------------+--------------+


Play this puzzle online at the Daily Sudoku site

Just like the other day, path of least resistance. Finned X-Wing (2), c39=>r2c7<>2

[pjb]

Code: Select all

 467     26      1      | 5      9      27     | 3      2467   8     
 347     9      a23     | 6      8      1      | 7-2    5      247   
 67      8       5      | 34     34     27     | 9      1      267   
------------------------+----------------------+---------------------
 36      1      b23     | 48     7      458    | 58     9     c26     
 58      247     47     | 9      6      58     | 1     d247    3     
 58      467     9      | 2      1      3      | 58     467    467   
------------------------+----------------------+---------------------
 9       47      478    | 1      34     468    |f267   e237    5     
 2       3       6      | 7      5      9      | 4      8      1     
 1       5       478    | 348    2      468    | 67     37     9     


X-cycle: (2)r2c3 = r4c3 - r4c9 = r5c8 - r7c8 = r7c7 => -2 r2c7; stte

I also like y-wing of 267 (r1c2, r3c16 => -2 r1c6) which creates second y-wing of 267 (r2c7, r34c9) => -2 r2c9, stte

Phil

[gurth]

The last few puzzles have let CW show its paces as never before, some steps are becoming common and call for extension of notation for
common events.

R761 refers to a conditionally red digit, meaning a digit that is True IF Red is True. This 'R' applies to all subsequent digits until changed by a 'B'.
d761 will mean delete 761 from grid, ( any colour slash through candidate).
e761 will mean establish 761 as True. (black rectangle).
RR761 will mean promote conditional Red digit (underlined in Red) to equivalence with all Red Conjugates (circled with Red colour).
RR is also used for original set of conjugate reds.
For Blue, BB instead of RR, same meaning.

Today's Puzzle:
BB612,RR631,d611.
RR212,716,236,d736(because of BB731!),e236,d239,RR739,
R227,d229,429,d421,RR721,d711,e411, stte.

Note: No contradiction was found, and it is not immediately obvious which colour is true. Two digits needed to be placed to allow stte, as the first one unfortunately did not.

Edited later: shorter, and better:
BB612,RR631,d611.
RR212,716,236,d726(because of BB731!),e236,e716,e411,stte.

Edited later: still shorter and better:
BB612,RR631,d611.
RR212,716,236,d726(because of BB731!),e236,stte.

("Two digits needed to be placed to allow stte, as the first one unfortunately did not" in original post was nonsense.)

[SteveG48]

Code: Select all

 *-----------------------------------------------------------*
 | 467   26    1     | 5     9     27    | 3     2467  8     |
 | 347   9    a23    | 6     8     1     | 7-2   5    d247   |
 | 67    8     5     | 34    34    27    | 9     1    d267   |
 *-------------------+-------------------+-------------------|
 | 36    1    b23    | 48    7     458   | 58    9    c26    |
 | 58    247   47    | 9     6     58    | 1     247   3     |
 | 58    467   9     | 2     1     3     | 58    467   467   |
 *-------------------+-------------------+-------------------|
 | 9     47    478   | 1     34    468   | 267   237   5     |
 | 2     3     6     | 7     5     9     | 4     8     1     |
 | 1     5     478   | 348   2     468   | 67    37    9     |
 *-----------------------------------------------------------*


Minor variant on Leren and Phil. Same as Marty?:

(2)r2c3 = r4c3 - r4c9 = r23c9 => -2 r2c7 ; stte

[Leren]

SteveG48 wrote : Minor variant on Leren and Phil. Same as Marty?

It's the same as Marty - a finned XWing c39/r24 fin r3c9 or you can consider it to be a Grouped Skyscraper.

Leren

[SteveG48]

Yup, kinda thought so. Thanks.