HoDoKu Solving Technique Index: Example for "Locked Triple"

Solving Technique Example

Original sudoku:

....5..3774....8......3....5.1.....9..6..7.23.38.19......6....2.....235...9......

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

:0111:9:..+2.5+4.3774+3...8.+5..+5+73.+2..5+71...+4+89+4+96+5+87+123+238+419+5+7+6.+5.6....2.....235..+29..+5...::925 984:

The following representation can be pasted in most Sudoku programs:

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

| 1689  168  2  | 189  5    4   | 69  3     7   |

| 7     4    3  | 129  269  16  | 8   169   5   |

| 1689  168  5  | 7    3    168 | 2   1469  14  |

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

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

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

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

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

| 138   5    47 | 6    479  138 | 79  149   2   |

| 168   168  47 | 189  479  2   | 3   5     148 |

| 1368  2    9  | 138  47   5   | 67  146   148 |

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

Representation of the step:

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

| 1689  168  2  | 189    5     4   | 69  3     7   |

| 7     4    3  | 129    26-9  16  | 8   169   5   |

| 1689  168  5  | 7      3     168 | 2   1469  14  |

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

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

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

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

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

| 138   5    47 | 6     *479   138 | 79  149   2   |

| 168   168  47 | 18-9  *479   2   | 3   5     148 |

| 1368  2    9  | 138   *47    5   | 67  146   148 |

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



Locked Triple: 4,7,9 in r789c5 => r2c5,r8c4<>9