HoDoKu Solving Technique Index: Example for "Avoidable Rectangle Type 2"

Solving Technique Example

Original sudoku:

.85....6......47...3....1.........5.6...43....7.82.3.....45967..........9.416...3

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

:0608:9:.85....6......47+3..3....1..+3+4+2....5.6.+8.43....7.82.3..+8.+345967..........9.416+7..3:222 169 281 282 287 887 288 888 289 589 889:917 949 958 959 968 969 987:

The following representation can be pasted in most Sudoku programs:

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

| 1247  8    5   | 2379   1379  12   | 249  6     249   |

| 12    169  169 | 2569   189   4    | 7    3     2589  |

| 247   3    679 | 25679  789   2568 | 1    2489  24589 |

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

| 3     4    2   | 679    179   16   | 89   5     16789 |

| 6     159  8   | 579    4     3    | 29   129   1279  |

| 15    7    19  | 8      2     156  | 3    149   469   |

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

| 8     12   3   | 4      5     9    | 6    7     12    |

| 157   156  167 | 23     38    28   | 459  149   149   |

| 9     25   4   | 1      6     7    | 258  28    3     |

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

Representation of the step:

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

| 1247  8     5   | 2379   1379  12   |  24-9  6     249    |

| 12    169   169 | 2569   189   4    |  7     3     2589   |

| 247   3     679 | 25679  789   2568 |  1     2489  24589  |

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

| 3     4    *2   | 679    179   16   | *89    5     1678-9 |

| 6     159  *8   | 579    4     3    | *29    12-9  127-9  |

| 15    7     19  | 8      2     156  |  3     14-9  46-9   |

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

| 8     12    3   | 4      5     9    |  6     7     12     |

| 157   156   167 | 23     38    28   |  45-9  149   149    |

| 9     25    4   | 1      6     7    |  258   28    3      |

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



Avoidable Rectangle Type 2: 2/8 in r4c37,r5c37 => r18c7,r456c9,r56c8<>9