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

Solving Technique Example

Original sudoku:

.6.5..2.11.........239....664...........27.9..52....8........6...1..59..5...7.1..

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

:0601:8:+46+95..2+711+8+5+7+6+2+4+3+9+7239..+8+5664+7+8+5+9+3+1+2+3+1+8+427+69+5+952..+6+78+4..+4.+9.+56...1+6.59..5+9+6.7.1..::899:

The following representation can be pasted in most Sudoku programs:

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

| 4   6   9 | 5    38   38  | 2  7   1   |

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

| 7   2   3 | 9    14   14  | 8  5   6   |

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

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

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

| 9   5   2 | 13   13   6   | 7  8   4   |

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

| 28  37  4 | 123  9    138 | 5  6   378 |

| 28  37  1 | 6    348  5   | 9  24  378 |

| 5   9   6 | 23   7    348 | 1  24  38  |

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

Representation of the step:

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

| 4    6   9 | 5    38   38  | 2  7    1   |

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

| 7    2   3 | 9    14   14  | 8  5    6   |

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

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

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

| 9    5   2 | 13   13   6   | 7  8    4   |

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

| 28  *37  4 | 123  9    138 | 5  6   *378 |

| 28  *37  1 | 6    348  5   | 9  24  *378 |

| 5    9   6 | 23   7    348 | 1  24   3-8 |

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



Uniqueness Test 2: 3/7 in r7c29,r8c29 => r9c9<>8






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