HoDoKu Solving Technique Index: Example for "Unique Rectangle Type 6"

Solving Technique Example

Original sudoku:

541.............45...9....3......891.........6..397.....7..........536..3.4.26..7

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

:0605:5:541.+3.+7.+9....+7.+245...9+4+5+1.3....+6.891....+8.+3+7+66+1+8397+4+5+2+2+67+4+1+9+5+3+8+1+8+9+7536+2+43+54+826+9+17::543 554:

The following representation can be pasted in most Sudoku programs:

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

| 5   4    1   | 26   3  28  | 7  68  9 |

| 89  39   36  | 16   7  18  | 2  4   5 |

| 78  27   26  | 9    4  5   | 1  68  3 |

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

| 47  237  235 | 25   6  24  | 8  9   1 |

| 49  29   25  | 125  8  124 | 3  7   6 |

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

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

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

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

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

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

Representation of the step:

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

| 5   4     1    |  26    3  28  | 7  68  9 |

| 89  39    36   |  16    7  18  | 2  4   5 |

| 78  27    26   |  9     4  5   | 1  68  3 |

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

| 47  237  *23-5 | *25    6  24  | 8  9   1 |

| 49  29   *25   | *12-5  8  124 | 3  7   6 |

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

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

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

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

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

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



Uniqueness Test 6: 2/5 in r4c34,r5c34 => r4c3,r5c4<>5