HoDoKu Solving Technique Index: Example for "Unique Rectangle Type 3"

Solving Technique Example

Original sudoku:

.8..3.1.......23....64...753.9.2.....2.5.1.8...7.4...27..6...........8..54......7

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

:0602:469:.8+2+73+51...+7+5.+623.+8.+364..+2753.9+82....+62+45.1.8+3+8.7.4...27+9.6...+2.+2+6....8..54.+2....7::488 698 988 998:

The following representation can be pasted in most Sudoku programs:

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

| 49   8   2   | 7    3     5    | 1     469    469 |

| 149  7   5   | 19   6     2    | 3     49     8   |

| 19   3   6   | 4    189   89   | 2     7      5   |

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

| 3    15  9   | 8    2     67   | 4567  1456   146 |

| 6    2   4   | 5    79    1    | 79    8      3   |

| 8    15  7   | 39   4     369  | 569   1569   2   |

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

| 7    9   138 | 6    158   348  | 45    2      14  |

| 2    6   13  | 139  1579  3479 | 8     13459  149 |

| 5    4   138 | 2    189   389  | 69    1369   7   |

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

Representation of the step:

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

| 49    8   2   | 7    3     5    | 1      469      469 |

| 149   7   5   | 19   6     2    | 3      49       8   |

| 19    3   6   | 4    189   89   | 2      7        5   |

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

| 3    *15  9   | 8    2     67   | 4567  *1456     146 |

| 6     2   4   | 5    79    1    | 79     8        3   |

| 8    *15  7   | 39   4     369  | 569   *1569     2   |

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

| 7     9   138 | 6    158   348  | 45     2        14  |

| 2     6   13  | 139  1579  3479 | 8      13-45-9  149 |

| 5     4   138 | 2    189   389  | 69     13-6-9   7   |

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



Uniqueness Test 3: 1/5 in r4c28,r6c28 => r8c8<>4, r9c8<>6, r89c8<>9