HoDoKu Solving Technique Index: Example for "Locked Triple"

Solving Technique Example

Original sudoku:

4..5..37.32......4.6.......8....2.3.21.84...........9..7..9.1...4.651.......7....

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

:0111:567:4..5..37.32......4.6.......8....2.3.21.84...........9..7..9.1..+94.651.......7....::547 549 553 556 567 569 647 649 653 656 667 669 747 749 753 756 767 769:

The following representation can be pasted in most Sudoku programs:

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

| 4    89   189    | 5       1268  689   | 3       7      12689  |

| 3    2    15789  | 179     168   6789  | 5689    1568   4      |

| 157  6    15789  | 123479  1238  34789 | 2589    1258   12589  |

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

| 8    59   45679  | 179     16    2     | 4567    3      1567   |

| 2    1    35679  | 8       4     35679 | 567     56     567    |

| 567  35   34567  | 137     136   3567  | 245678  9      125678 |

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

| 56   7    23568  | 234     9     348   | 1       24568  23568  |

| 9    4    238    | 6       5     1     | 278     28     2378   |

| 156  358  123568 | 234     7     348   | 245689  24568  235689 |

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

Representation of the step:

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

| 4    89   189      | 5       1268  689      |  3           7       12689     |

| 3    2    15789    | 179     168   6789     |  5689        1568    4         |

| 157  6    15789    | 123479  1238  34789    |  2589        1258    12589     |

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

| 8    59   45679    | 179     16    2        |  4-5-6-7     3       1-5-6-7   |

| 2    1    3-5-6-79 | 8       4     3-5-6-79 | *567        *56     *567       |

| 567  35   34567    | 137     136   3567     |  24-5-6-78   9       12-5-6-78 |

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

| 56   7    23568    | 234     9     348      |  1           24568   23568     |

| 9    4    238      | 6       5     1        |  278         28      2378      |

| 156  358  123568   | 234     7     348      |  245689      24568   235689    |

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



Locked Triple: 5,6,7 in r5c789 => r4c79,r5c36,r6c79<>5, r4c79,r5c36,r6c79<>6, r4c79,r5c36,r6c79<>7