HoDoKu Solving Technique Index: Example for "XYZ-Wing"

Solving Technique Example

Original sudoku:

.69..........21......8..4....153..8...76...5.......1..........39.2.8..1....34.2.5

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

:0801:7:+869+4+5+3+7+2+1...+921+5+6+8+2+1+58..4+3+9+6+2153+4+98+7+4.76+1.+35+2...+2..1+4+6...+1.+2+8.39+32+78+5+61+4+1..34.2.5::792:

The following representation can be pasted in most Sudoku programs:

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

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

| 37  47   34 | 9  2   1   | 5  6   8 |

| 2   1    5  | 8  67  67  | 4  3   9 |

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

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

| 4   89   7  | 6  1   89  | 3  5   2 |

| 35  589  38 | 2  79  789 | 1  4   6 |

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

| 57  457  46 | 1  69  2   | 8  79  3 |

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

| 1   78   68 | 3  4   69  | 2  79  5 |

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

Representation of the step:

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

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

|  37  *47   34 | 9  2   1   | 5  6   8 |

|  2    1    5  | 8  67  67  | 4  3   9 |

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

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

|  4    89   7  | 6  1   89  | 3  5   2 |

|  35   589  38 | 2  79  789 | 1  4   6 |

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

| *57  *457  46 | 1  69  2   | 8  79  3 |

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

|  1   -78   68 | 3  4   69  | 2  79  5 |

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



XYZ-Wing: 4/5/7 in r27c2,r7c1 => r9c2<>7