HoDoKu Solving Technique Index: Example for "Backdoors"

Solving Technique Example

Original sudoku:

1.......2.9.4...5...6...7...5.9.3.......7.......85..4.7.....6...3...9.8...2.....1

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

:0000:x:1.......2.9.4...5...6...7...5.9.3.......7.......85..4.7.....6...3...9.8...2.....1:::

The following representation can be pasted in most Sudoku programs:

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

| 1       478    34578 | 3567   3689   5678  | 3489    369    2     |

| 238     9      378   | 4      12368  12678 | 138     5      368   |

| 23458   248    6     | 1235   12389  1258  | 7       139    3489  |

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

| 2468    5      1478  | 9      1246   3     | 128     1267   678   |

| 234689  12468  13489 | 126    7      1246  | 123589  12369  35689 |

| 2369    1267   1379  | 8      5      126   | 1239    4      3679  |

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

| 7       148    14589 | 1235   12348  12458 | 6       239    3459  |

| 456     3      145   | 12567  1246   9     | 245     8      457   |

| 45689   468    2     | 3567   3468   45678 | 3459    379    1     |

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

HoDoKu Solving Technique Index: Example for "Backdoors"

Original sudoku:

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

The following representation can be pasted in most Sudoku programs:

Representation of the step: