HoDoKu Solving Technique Index: Example for "Grouped Continuous Nice Loop/AIC Loop with ALS node"

Solving Technique Example

Original sudoku:

..243.9...3.7...1519.....2.2.......694.............74.3.9......6...1.....8.5..69.

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

:0709:1238:.+5243+19+6..3+67...1519.....2.2.......694.......+5+6....74+93.9......6.+5.1.....8.5..69.:825 826 833 837 839 254 255 256 779 789 495 496 499 799:199 275 276 286 346 356 386 844 845 846 854 855 856 863 864:

The following representation can be pasted in most Sudoku programs:

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

| 78  5    2    | 4     3      1      | 9      6    78   |

| 48  3    6    | 7     29     29     | 48     1    5    |

| 1   9    47   | 68    568    568    | 34     2    347  |

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

| 2   17   1378 | 1389  45789  345789 | 1358   358  6    |

| 9   4    1378 | 1368  5678   35678  | 12358  358  1238 |

| 5   6    138  | 1238  28     238    | 7      4    9    |

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

| 3   127  9    | 268   24678  24678  | 12458  578  1248 |

| 6   27   5    | 2389  1      234789 | 2348   378  2348 |

| 47  8    147  | 5     27     237    | 6      9    123  |

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

Representation of the step:

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

| 78  5    2    |  4       3        1       | 9      6     78   |

| 48  3    6    |  7       29       29      | 48     1     5    |

| 1   9    47   |  68      568      568     | 34     2     347  |

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

| 2   17   1378 |  13-89   457-89  -3457-89 | 1358   358   6    |

| 9   4    1378 |  136-8   567-8   -3567-8  | 12358  358   1238 |

| 5   6    13-8 | *123-8  A28      A238     | 7      4     9    |

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

| 3   127  9    | *268    -24678   -24678   | 12458  578   1248 |

| 6   27   5    | *2389    1       -2-34789 | 2348   378   2348 |

| 47  8    147  |  5      *27      *237     | 6      9    *-123 |

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



Grouped Continuous Nice Loop 2= r9c9 =3= r9c6 -3- ALS:r6c56 -2- r6c4 =2= r78c4 -2- r9c56 =2= r9c9 =3 => r9c9<>1, r7c56,r8c6<>2, r458c6<>3, r4c456,r5c456,r6c34<>8