Sudoku with a specific pattern

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Sudoku with a specific pattern

Postby urhegyi » Fri Feb 26, 2021 7:08 pm

Is there any research done how to generate pattern like thisone:
cross-pattern.png
cross-pattern.png (15.27 KiB) Viewed 338 times

Code: Select all
5...6...4.9.3.5.7...7...9...1.5.3.4.4...8...3.8.7.4.6...2...3...5.2.6.1.3...7...9
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Re: Sudoku with a specific pattern

Postby 1to9only » Fri Feb 26, 2021 7:23 pm

See here and here. The method is adequate to generate grids that have the same pattern of clues.
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Re: Sudoku with a specific pattern

Postby urhegyi » Fri Feb 26, 2021 7:27 pm

I played a bit with this and found anotherone:
cross-another.png
cross-another.png (15.13 KiB) Viewed 331 times

Code: Select all
5...2...4.9.3.5.7...7...9...1.6.2.4.4...5...3.8.4.3.6...2...3...5.2.6.1.3...7...9
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Re: Sudoku with a specific pattern

Postby Leren » Fri Feb 26, 2021 8:01 pm

For the first puzzle :

Code: Select all
*---------------------------------------------*
| 5    23   e18   | 9   6   7   |d18  23  4   |
| 28-1 9     148  | 3   124 5   | 6   7   128 |
| 26-1 2346  7    | 18  124 128 | 9   235 125 |
|-----------------+-------------+-------------|
|b2679 1     69   | 5   29  3   |c278 4   28  |
| 4    27    5    | 6   8   12  | 127 9   3   |
| 29   8     3    | 7   129 4   | 125 6   125 |
|-----------------+-------------+-------------|
|a17   47    2    | 14  5   9   | 3   8   6   |
| 89   5     89   | 2   3   6   | 4   1   7   |
| 3    46    46-1 | 148 7   18  | 25  25  9   |
*---------------------------------------------*

(1=7) r7c1 - r4c1 = (7-8) r4c7 = (8-1) r1c7 = (1) r1c3 => - 1 r23c1, r9c3; stte. And the second puzzle :

Code: Select all
*------------------------------------------------------*
| 5   c36   18  | 79    2     79   | 168   a38   4     |
| 126  9    148 | 3     1468  5    | 1268   7    1268  |
| 126  346  7   | 18    1468  148  | 9      2358 12568 |
|---------------+------------------+-------------------|
| 79   1    3   | 6     89    2    | 578    4    58    |
| 4    2    6   | 178   5     178  | 18     9    3     |
| 79   8    5   | 4     19    3    | 127    6    12    |
|---------------+------------------+-------------------|
| 16   7    2   | 189-5 148   1489 | 3     b58   568   |
| 8    5    9   | 2     3     6    | 4      1    7     |
| 3   c46  c14  |c158   7    c18   | 268-5  28-5 9     |
*------------------------------------------------------*

(5=3) r17c8 - (3=6) r1c2 - (6=5) r9c2346; => -5 r7c4, r9c78; stte

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