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

Solving Technique Example

Original sudoku:

9.....6....1..6.387.6.8...........76..41......5.947.2.2.......5...25........9...1

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

:0608:9:9+8....6+4+7..1..6+9387.6.8+9+5+1+2+1...+3.+476+3+741+6+2+8+5+9+65+8947+12+32.....+3.5+8..25.+7.+4....9.+2.1:474 494:943 972 982:

The following representation can be pasted in most Sudoku programs:

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

| 9   8     235 | 35    12  135 | 6  4    7 |

| 45  24    1   | 457   27  6   | 9  3    8 |

| 7   34    6   | 34    8   9   | 5  1    2 |

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

| 1   29    29  | 58    3   58  | 4  7    6 |

| 3   7     4   | 1     6   2   | 8  5    9 |

| 6   5     8   | 9     4   7   | 1  2    3 |

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

| 2   1469  79  | 678   17  148 | 3  689  5 |

| 8   1369  39  | 2     5   13  | 7  69   4 |

| 45  346   357 | 3678  9   348 | 2  68   1 |

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

Representation of the step:

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

| 9   8       235 | 35    12  135 |  6  4    7 |

| 45  24      1   | 457   27  6   |  9  3    8 |

| 7   34      6   | 34    8   9   |  5  1    2 |

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

| 1   29      2-9 | 58    3   58  |  4  7    6 |

| 3   7       4   | 1     6   2   |  8  5    9 |

| 6   5       8   | 9     4   7   |  1  2    3 |

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

| 2   146-9  *79  | 678   17  148 | *3  689  5 |

| 8   136-9  *39  | 2     5   13  | *7  69   4 |

| 45  346     357 | 3678  9   348 |  2  68   1 |

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



Avoidable Rectangle Type 2: 3/7 in r7c37,r8c37 => r4c3,r78c2<>9