HoDoKu Solving Technique Index: Example for "Siamese Sashimi Swordfish"

Solving Technique Example

Original sudoku:

...1.7......9.5.....3.8.5...9.....7...52.64..1.......87.......9..6.4.3...2.....1.

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

:0321:1:...1.7......9.5.....3.8.5...9.....7...52.64..1.......87.......9..6.4.3...2.....1.:431 432 632 438 239 439 639 841 843 345 355 365 375 395:146 175:r358 c259269 fr8c6 fr5c5

The following representation can be pasted in most Sudoku programs:

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

| 245689  4568   2489  | 1      236   7    | 2689   234689  2346   |

| 2468    14678  12478 | 9      236   5    | 12678  23468   123467 |

| 269     17     3     | 46     8     24   | 5      269     17     |

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

| 2346    9      24    | 3458   15    1348 | 126    7       12356  |

| 38      378    5     | 2      179   6    | 4      39      13     |

| 1       3467   247   | 3457   579   349  | 269    23569   8      |

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

| 7       13458  148   | 3568   1256  1238 | 268    24568   9      |

| 589     158    6     | 578    4     1289 | 3      258     257    |

| 34589   2      489   | 35678  5679  389  | 678    1       4567   |

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

Representation of the step:

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

| 245689   4568   2489  | 1       236    7    | 2689   234689   2346   |

| 2468     14678  12478 | 9       236    5    | 12678  23468    123467 |

| 269     *17     3     | 46      8      24   | 5      269     *17     |

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

| 2346     9      24    | 3458    15    -1348 | 126    7        12356  |

| 38       378    5     | 2      #179    6    | 4      39      *13     |

| 1        3467   247   | 3457    579    349  | 269    23569    8      |

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

| 7        13458  148   | 3568   -1256   1238 | 268    24568    9      |

| 589     *158    6     | 578     4     #1289 | 3      258      257    |

| 34589    2      489   | 35678   5679   389  | 678    1        4567   |

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



Siamese Sashimi Swordfish: 1 r358 c259/c269 fr8c6 fr5c5 => r4c6,r7c5<>1