HoDoKu Solving Technique Index: Example for "Dual 2-String Kite"

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:

:0401:4:+5.+91.7+8...+8+79.5+1...+13.8.5+9+7.9+4.+1.+27.+8+752+964+3+11.+2.+7.+9.87.+1...+6.9+9+56+74+13+8+2.2+8..+9+71.:431 574 375 594 395:419 428:

The following representation can be pasted in most Sudoku programs:

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

| 5    46  9 | 1    236  7   | 8  246  346 |

| 246  8   7 | 9    236  5   | 1  246  346 |

| 26   1   3 | 46   8    24  | 5  9    7   |

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

| 36   9   4 | 358  1    38  | 2  7    56  |

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

| 1    36  2 | 345  7    34  | 9  56   8   |

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

| 7    34  1 | 38   25   238 | 6  45   9   |

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

| 34   2   8 | 36   56   9   | 7  1    45  |

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

Representation of the step:

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

|  5    *46  9 | 1    236  7   | 8   246    3-46 |

| *246   8   7 | 9    236  5   | 1   2-46   346  |

|  26    1   3 | 46   8    24  | 5   9      7    |

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

|  36    9   4 | 358  1    38  | 2   7      56   |

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

|  1     36  2 | 345  7    34  | 9   56     8    |

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

|  7    *34  1 | 38   25   238 | 6  *45     9    |

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

| *34    2   8 | 36   56   9   | 7   1     *45   |

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



Dual 2-String Kite: 4 in r2c1,r7c8/in r1c2,r9c9 (connected by r7c2,r9c1) => r1c9,r2c8<>4