HoDoKu Solving Technique Index: Example for "Unique Rectangle Type 2"

Solving Technique Example

Original sudoku:

.79.....6..5..14..6.............8.2..98.1.....1.2...54.......6885.4..2.3..6......

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

:0601:7:.79.....6+3.5+6.14..6........+5+6+4..8.2.+298+51+4+6+3+7+71+32..+854.......6885.4..2.3..6....+4.::774 775 776 783 788 794 795 796:

The following representation can be pasted in most Sudoku programs:

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

| 14   7    9   | 38     23458    235   | 135    18    6    |

| 3    28   5   | 6      2789     1     | 4      789   29   |

| 6    248  12  | 3789   2345789  23579 | 13579  1789  1259 |

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

| 5    6    4   | 379    379      8     | 19     2     19   |

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

| 7    1    3   | 2      69       69    | 8      5     4    |

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

| 149  234  127 | 1379   23579    23579 | 1579   6     8    |

| 8    5    17  | 4      679      679   | 2      179   3    |

| 19   23   6   | 13789  235789   23579 | 1579   4     159  |

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

Representation of the step:

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

| 14   7    9   | 38       23458     235    | 135    18    6    |

| 3    28   5   | 6        2789      1      | 4      789   29   |

| 6    248  12  | 3789     2345789   23579  | 13579  1789  1259 |

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

| 5    6    4   | 379      379       8      | 19     2     19   |

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

| 7    1    3   | 2       *69       *69     | 8      5     4    |

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

| 149  234  127 | 13-79    235-79    235-79 | 1579   6     8    |

| 8    5    1-7 | 4       *679      *679    | 2      1-79  3    |

| 19   23   6   | 13-789   235-789   235-79 | 1579   4     159  |

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



Uniqueness Test 2: 6/9 in r6c56,r8c56 => r7c456,r8c38,r9c456<>7