HoDoKu Solving Technique Index: Example for "Hidden Rectangle"

Solving Technique Example

Original sudoku:

....5.2..3..7.....7...9..1.9..1..746............5....9.29...4...6...4....8...23.1

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

:0606:5:.+9.+45.2..3.+27+8..+9.7..+29..1.9+3+51+2+8746.+7.+6.+9......5.+7..9+129+3+7+54+6+8+56+3+8+14+9..+48+7+9+623+51::529:

The following representation can be pasted in most Sudoku programs:

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

| 68   9    168  | 4  5   136 | 2    378  37  |

| 3    145  2    | 7  8   16  | 56   9    45  |

| 7    45   468  | 2  9   36  | 568  1    345 |

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

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

| 28   7    148  | 6  34  9   | 158  238  235 |

| 268  14   1468 | 5  34  7   | 18   238  9   |

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

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

| 5    6    3    | 8  1   4   | 9    27   27  |

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

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

Representation of the step:

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

| 68    9    168  | 4  5   136 | 2    378   37  |

| 3    *145  2    | 7  8   16  | 56   9    *4-5 |

| 7    *45   468  | 2  9   36  | 568  1    *345 |

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

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

| 28    7    148  | 6  34  9   | 158  238   235 |

| 268   14   1468 | 5  34  7   | 18   238   9   |

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

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

| 5     6    3    | 8  1   4   | 9    27    27  |

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

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



Hidden Rectangle: 4/5 in r2c29,r3c29 => r2c9<>5