HoDoKu Solving Technique Index: Example for "Finned Swordfish"

Solving Technique Example

Original sudoku:

..3..86..41..5.9.......6.1.84.3...9..2...543.5..1........2.....3...8.26......45..

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

:0311:7:+2.3.+186+5.41+6+75+39+8+2.+5+8.+26.1.84.3+6+2.9+5+62.+8.543.5+3.1+4.+8+2+6.+6+52...+4+83.+4+58.26..+8+2+6.45+7.::737:c159 r357 fr1c9

The following representation can be pasted in most Sudoku programs:

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

| 2    79  3   | 49  1    8   | 6   5  47  |

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

| 79   5   8   | 49  2    6   | 37  1  347 |

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

| 8    4   17  | 3   6    2   | 17  9  5   |

| 6    2   179 | 8   79   5   | 4   3  17  |

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

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

| 179  6   5   | 2   379  179 | 13  4  8   |

| 3    79  4   | 5   8    179 | 2   6  19  |

| 19   8   2   | 6   39   4   | 5   7  139 |

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

Representation of the step:

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

|  2    79  3   | 49   1    8   | 6    5  #47  |

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

| *79   5   8   | 49   2    6   | 3-7  1  *347 |

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

|  8    4   17  | 3    6    2   | 17   9   5   |

|  6    2   179 | 8   *79   5   | 4    3  *17  |

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

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

| *179  6   5   | 2   *379  179 | 13   4   8   |

|  3    79  4   | 5    8    179 | 2    6   19  |

|  19   8   2   | 6    39   4   | 5    7   139 |

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



Finned Swordfish: 7 c159 r357 fr1c9 => r3c7<>7