HoDoKu Solving Technique Index: Example for "Grouped Discontinuous Nice Loop with ALS node"

Solving Technique Example

Original sudoku:

....3.......2...577.....81.1.9..5....6...4.3.....82.....87....44......8..37..15..

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

:0710:5:..+1.3+7......2+1+8.577.....81.1.9+3+65....6..+74.3.....82.....87....44.....+78..37+8+415..:611 914 932 934 939 277 677 977 984 289 689 989:582:

The following representation can be pasted in most Sudoku programs:

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

| 2589  24589  1     | 456  3    7   | 2469  2469  269   |

| 369   49     346   | 2    1    8   | 3469  5     7     |

| 7     245    23456 | 456  59   69  | 8     1     236   |

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

| 1     2478   9     | 3    6    5   | 24    247   28    |

| 258   6      25    | 19   7    4   | 129   3     12589 |

| 35    457    345   | 19   8    2   | 1469  4679  1569  |

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

| 2569  1259   8     | 7    259  369 | 13    269   4     |

| 4     1259   256   | 56   259  369 | 7     8     13    |

| 269   3      7     | 8    4    1   | 5     269   269   |

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

Representation of the step:

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

|  2589   24589   1     |  456   3    7   | 2469  2469  269   |

|  369    49      346   |  2     1    8   | 3469  5     7     |

|  7      245     23456 |  456   59   69  | 8     1     236   |

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

|  1      2478    9     |  3     6    5   | 24    247   28    |

|  258    6       25    |  19    7    4   | 129   3     12589 |

|  35     457     345   |  19    8    2   | 1469  4679  1569  |

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

| *2569  *1259    8     |  7    *259  369 | 13    269   4     |

|  4     *12-59  A256   | A56   *259  369 | 7     8     13    |

|  269    3       7     |  8     4    1   | 5     269   269   |

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



Grouped Discontinuous Nice Loop r8c2 -5- r7c12 =5= r7c5 =2= r8c5 -2- ALS:r8c34 -5- r8c2 => r8c2<>5