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

Solving Technique Example

Original sudoku:

.395....85.......2....2.4...419.5...9...7..3......857...8..67...........19.......

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

:0605:7:+2395+4+7+6+185+7+4+8+6+1+3+92+8+1+6+32+94+5+7+7419+35..+69+8+5+67+2+13+4...+4+1857+9..8.+967.......+3+9..19...+4.+6.::784 793:

The following representation can be pasted in most Sudoku programs:

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

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

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

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

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

| 7   4    1   | 9    3   5 | 28  28   6   |

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

| 36  26   23  | 4    1   8 | 5   7    9   |

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

| 34  25   8   | 12   9   6 | 7   24   135 |

| 46  256  27  | 127  58  3 | 9   248  15  |

| 1   9    237 | 27   58  4 | 28  6    35  |

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

Representation of the step:

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

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

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

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

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

| 7   4     1    |  9     3   5 | 28  28   6   |

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

| 36  26    23   |  4     1   8 | 5   7    9   |

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

| 34  25    8    |  12    9   6 | 7   24   135 |

| 46  256  *27   | *12-7  58  3 | 9   248  15  |

| 1   9    *23-7 | *27    58  4 | 28  6    35  |

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



Uniqueness Test 6: 2/7 in r8c34,r9c34 => r8c4,r9c3<>7