HoDoKu Solving Technique Index: Example for "Grouped Alternate Inference Chain Type 1"

Solving Technique Example

Original sudoku:

..512.....7.....8..8....345............6...3.4.2.81..9.......28..9.4.6.....8..7.4

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

:0711:5:+3+4512+8+9..+97+6...+28+1+28+1...345.......+1.+1..6...3.4.2.81+5.9+7.+4...+128+8+19.4.6+5+3.+2+38+1.7+94::574 575 576 591:

The following representation can be pasted in most Sudoku programs:

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

| 3   4     5  | 1       2     8      | 9   67  67  |

| 9   7     6  | 345     35    345    | 2   8   1   |

| 2   8     1  | 79      679   679    | 3   4   5   |

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

| 56  3569  78 | 234579  3579  234579 | 48  1   267 |

| 1   59    78 | 6       579   24579  | 48  3   27  |

| 4   36    2  | 37      8     1      | 5   67  9   |

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

| 7   56    4  | 359     3569  3569   | 1   2   8   |

| 8   1     9  | 27      4     27     | 6   5   3   |

| 56  2     3  | 8       1     56     | 7   9   4   |

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

Representation of the step:

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

|  3    4     5  |  1        2       8      | 9   67  67  |

|  9    7     6  |  345      35      345    | 2   8   1   |

|  2    8     1  |  79      *679    *679    | 3   4   5   |

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

|  56   3569  78 |  234579  *3579    234579 | 48  1   267 |

|  1    59    78 |  6       *579     24579  | 48  3   27  |

|  4   *36    2  | *37       8       1      | 5   67  9   |

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

|  7   *56    4  |  3-59     3-569   3-569  | 1   2   8   |

|  8    1     9  |  27       4       27     | 6   5   3   |

| -56   2     3  |  8        1      *56     | 7   9   4   |

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



Grouped AIC 5- r7c2 -6- r6c2 -3- r6c4 -7- r45c5 =7= r3c5 =6= r3c6 -6- r9c6 -5 => r7c456,r9c1<>5