HoDoKu Solving Technique Index: Example for "Naked Pair"

Solving Technique Example

Original sudoku:

7....9.3....1.5..64..26...9..2.83951..7........56.............31......6......4.1.

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

:0200:3:7..+8+49.3.+9+2+81+35..64..26+7.+89+6+42+783951+3+97+4+5+1+6+2+8+8+156+9+2+3..+2.+4+5+1+6.+931....+8.6.+5....4.1.::382:

The following representation can be pasted in most Sudoku programs:

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

| 7  56    16  | 8   4   9 | 125   3   25   |

| 9  2     8   | 1   3   5 | 47    47  6    |

| 4  35    13  | 2   6   7 | 15    8   9    |

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

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

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

| 8  1     5   | 6   9   2 | 3     47  47   |

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

| 2  78    4   | 5   1   6 | 78    9   3    |

| 1  37    39  | 39  27  8 | 2457  6   2457 |

| 5  3678  369 | 39  27  4 | 278   1   27   |

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

Representation of the step:

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

| 7   56     16  |  8   4   9 | 125   3   25   |

| 9   2      8   |  1   3   5 | 47    47  6    |

| 4   35     13  |  2   6   7 | 15    8   9    |

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

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

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

| 8   1      5   |  6   9   2 | 3     47  47   |

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

| 2   78     4   |  5   1   6 | 78    9   3    |

| 1  -37    *39  | *39  27  8 | 2457  6   2457 |

| 5   3678   369 |  39  27  4 | 278   1   27   |

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



Naked Pair: 3,9 in r8c34 => r8c2<>3