HoDoKu Solving Technique Index: Example for "Unique Rectangle Type 3"

Solving Technique Example

Original sudoku:

5.8...12.........72....58.64....2....8.9..........697....2.........7.419.3.1592..

Use the following line if you want to load the sudoku in HoDoKu:

:0602:13:5.8...12.....+2...72....58.64....2.+8..8.9..........697....2..+7......7.419+73+41592+6+8:572 573 375 376 682 683:142 143 151 153 165 169 343 351 353 364 365 369:

The following representation can be pasted in most Sudoku programs:

.---------------------.------------------.------------------.

| 5     4679   8      | 3467  3469  347  | 1    2     34    |

| 1369  1469   1369   | 3468  2     1348 | 35   3459  7     |

| 2     1479   1379   | 347   1349  5    | 8    349   6     |

:---------------------+------------------+------------------:

| 4     15679  135679 | 357   13    2    | 356  8     135   |

| 136   8      123567 | 9     134   1347 | 356  345   12345 |

| 13    125    1235   | 3458  1348  6    | 9    7     12345 |

:---------------------+------------------+------------------:

| 1689  169    169    | 2     468   48   | 7    35    35    |

| 68    25     25     | 368   7     38   | 4    1     9     |

| 7     3      4      | 1     5     9    | 2    6     8     |

'---------------------'------------------'------------------'

Representation of the step:

.-------------------------.---------------------.--------------------.

|  5      4679    8       |  3467   3469   347  | 1    2      34     |

|  1369   1469    1369    |  3468   2      1348 | 35   3459   7      |

|  2      1479    1379    |  347    1349   5    | 8    349    6      |

:-------------------------+---------------------+--------------------:

|  4     -15679  -1-35679 |  357    13     2    | 356  8      135    |

| -1-36   8      -12-3567 |  9      134    1347 | 356  345    12345  |

|  13    *125    *1235    | -3458  -1-348  6    | 9    7     -12-345 |

:-------------------------+---------------------+--------------------:

|  1689   169     169     |  2      468    48   | 7    35     35     |

|  68    *25     *25      |  368    7      38   | 4    1      9      |

|  7      3       4       |  1      5      9    | 2    6      8      |

'-------------------------'---------------------'--------------------'



Uniqueness Test 3: 2/5 in r6c23,r8c23 => r4c23,r5c13,r6c59<>1, r45c3,r5c1,r6c459<>3