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

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.:825 826 833 837 839 254 255 256 779 789 495 496 499 799:143 153 275 276 286 364 399 864:

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 |  1389     45789   345789 | 1358   358   6    |

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

| 5   6    *138  | *12-3-8   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    *12-3 |

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



Grouped Continuous Nice Loop 2= r6c4 =1= r6c3 -1- r9c3 =1= r9c9 =2= r9c56 -2- r78c4 =2= r6c4 =1 => r45c3<>1, r7c56,r8c6<>2, r6c4,r9c9<>3, r6c4<>8