Steve Hodoku 1-17-2026

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Steve Hodoku 1-17-2026

Postby SteveG48 » Sun Jan 18, 2026 12:30 am

Code: Select all
 *-----------*
 |1..|29.|8..|
 |..9|..3|...|
 |2.7|86.|.4.|
 |---+---+---|
 |.7.|...|..8|
 |..1|.2.|6..|
 |5..|...|.9.|
 |---+---+---|
 |.1.|.84|5.3|
 |...|3..|2..|
 |..8|.72|..6|
 *-----------*
Steve
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Re: Steve Hodoku 1-17-2026

Postby rjamil » Sun Jan 18, 2026 10:07 am

Only single-digit POM moves after 9 singletons:

Code: Select all
 +------------------+-------------------+----------------+
 | 1     3456  3456 | 2      9     57   | 8     356  57  |
 | 468   4568  9    | 1457   145   3    | 17    56   2   |
 | 2     35    7    | 8      6     15   | 139   4    159 |
 +------------------+-------------------+----------------+
 | 3469  7     346  | 14569  1345  1569 | 134   2    8   |
 | 3489  3489  1    | 4579   2     579  | 6     35   457 |
 | 5     2     346  | 1467   134   8    | 1347  9    147 |
 +------------------+-------------------+----------------+
 | 69    1     2    | 69     8     4    | 5     7    3   |
 | 7     4569  456  | 3      15    1569 | 2     8    49  |
 | 349   3459  8    | 59     7     2    | 49    1    6   |
 +------------------+-------------------+----------------+

#MNVT: (9 1 3 21 6 5 2 2 3)
Single-digit POM: .33....3...3.......3....3..3.3.3.3..33.....3...33333............3....3..33....3..
Digit 3 not in 3 Templates => -3 @ r1c8 r3c2 r4c7 r5c1 r5c2 r6c7
Digit 3 in all 3 Templates => 3 @ r3c7 r5c8

Single-digit POM: .44......44.44.....4.......4.444.4..44.4....4..444.4.4.......4..444.4..444....4.4
Digit 4 not in 21 Templates => -4 @ r2c1 r2c2

Single-digit POM: .55..5.55.5.55..5..5...5..5...555......5.5.55..................5555555.5.5.5..5..
Digit 5 not in 6 Templates => -5 @ r1c9 r2c4 r3c9 r5c4 r5c6 r8c6
Digit 5 in all 6 Templates => 5 @ r5c9

Single-digit POM: .66....6.66.....6..........6.66.6..............66.....6..6......666.6.66.....6...
Digit 6 not in 5 Templates => -6 @ r1c3 r4c1 r8c3

Single-digit POM: .....7..7...7..77......7...............7.7......7..7.7...........7........7.7..7.
Digit 7 not in 2 Templates => -7 @ r6c4

Single-digit POM: ....9.....9...............99..9.9...99.9.99...........9..9......9...9..999.9..9..
Digit 9 not in 3 Templates => -9 @ r5c4 r8c9 r9c1 r9c2 r9c4
Digit 9 in all 3 Templates => 9 @ r3c9 r9c7; stte

Hidden Text: Show
https://www.philsfolly.net.au/Sudoku/index.htm POM output:
Code: Select all
4s at r1c23 only ones in row/column => -4 r2c12.
5s at r4c456 only ones in row/column => -5 r5c46.
Naked pairs of 57 at r1c69 => -5 r1c238

Naked triplets of 346 at r146c3 => -4 r8c3, -6 r8c3

Hidden pairs of 17 at r2c4 and r2c7
Hidden triples of 147 at r2c4, r2c5 and r2c7
No pattern of 1 includes r4c7, r6c4 so 1 can be deleted from r4c7, r6c4
All patterns of 3 include r3c7 so this can be made equal to 3
6s at r46c3 only ones in row/column => -6 r4c1.
Naked pairs of 34 at r19c2 => -4 r5c2

All patterns of 9 include r4c6 so this can be made equal to 9
Solved!

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Re: Steve Hodoku 1-17-2026

Postby jco » Sun Jan 18, 2026 3:53 pm

After basics
Code: Select all
,-----------------------------------------------------------,
| 1     346  *346   | 2     9     57    | 8     36    57    |
| 68    568   9     | 17    4     3     | 17    56    2     |
| 2    *35    7     | 8     6    *15    |*139   4     159   |
|-------------------+-------------------+-------------------|
| 34-69 7    *346   | 1469  5    (1)69# |*134   2     8     |
| 3489  3489  1     | 479   2     79    | 6     35    457   |
| 5     2     46    | 1467  3     8     | 147   9     147   |
|-------------------+-------------------+-------------------|
| 69#   1     2     | 69#   8     4     | 5     7     3     |
| 7     469   5     | 3     1     69#   | 2     8     49    |
| 349   349   8     | 5     7     2     | 49    1     6     |
'-----------------------------------------------------------'

Almost Remote Pair (69)r7c14, r48c6

RP = (1)r4c6 - (1=53)r3c26 - r1c3 = r4c3 - r4c7 = r3c7 - (3=51)r3c26 - (1)r4c6 = RP

=> -69 r4c1 lclste
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Re: Steve Hodoku 1-17-2026

Postby Cenoman » Sun Jan 18, 2026 5:43 pm

Code: Select all
 +----------------------+--------------------+-------------------+
 |  1      346    346   |  2      9    57    |  8     36   57    |
 |  68     568    9     |  17     4    3     | d17    56   2     |
 |  2      35     7     |  8      6   d15    | e139   4   e159   |
 +----------------------+--------------------+-------------------+
 |  3469*  7     a46-3# | b1469## 5   c169*  |fc134   2    8     |
 |  3489   3489   1     |  479    2    79    |  6     35*  457   |
 |  5      2      46    |  1467   3    8     |  147   9    147   |
 +----------------------+--------------------+-------------------+
 |  69*    1      2     |  69*    8    4     |  5     7    3     |
 |  7      469    5     |  3      1    69*   |  2     8    49    |
 |  349    349    8     |  5      7    2     |  49    1    6     |
 +----------------------+--------------------+-------------------+

Bivalue oddagon (69)r47, c16, b8 (*) having three external guardians (#: 6r4c3, 6r4c4, 9r4c4)
(6)r4c3 =odd= (6|9-1)r4c4 = r4c67 - (r3c6&r2c7) = (19-3)r3c79 = (3)r4c7 => -3 r4c3; ste
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