HoDoKu Solving Technique Index: Example for "Simple Colors"

Solving Technique Example

Original sudoku:

21..........9....4...4.7.......7..32...6......48.21..642...986...91.8...1.6.....9

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

:0500:3:21+4..+6.....+79.+2..4...4.7.....+1+87..32..+26+9.....48.21..642.+7.986+1..91+68...1+86+2+4...9:937 938 387 587 787 588 788 789:319 339 381:

The following representation can be pasted in most Sudoku programs:

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

| 2      1     4  | 35  358   6   | 3579   5789   3578 |

| 3568   356   7  | 9   1358  2   | 1356   158    4    |

| 35689  3569  35 | 4   1358  7   | 12356  1258   358  |

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

| 569    569   1  | 8   7     45  | 459    3      2    |

| 357    357   2  | 6   9     345 | 1457   14578  578  |

| 3579   4     8  | 35  2     1   | 579    579    6    |

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

| 4      2     35 | 7   35    9   | 8      6      1    |

| 357    357   9  | 1   6     8   | 24     24     35   |

| 1      8     6  | 2   4     35  | 357    57     9    |

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

Representation of the step:

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

|  2      1     4  | 35  358   6   | 3579   5789   -3578 |

|  3568   356   7  | 9   1358  2   | 1356   158     4    |

|  35689  3569  35 | 4   1358  7   | 12356  1258   -358  |

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

|  569    569   1  | 8   7     45  | 459    3       2    |

|  357    357   2  | 6   9     345 | 1457   14578   578  |

|  3579   4     8  | 35  2     1   | 579    579     6    |

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

|  4      2     35 | 7   35    9   | 8      6       1    |

| -357    357   9  | 1   6     8   | 24     24      35   |

|  1      8     6  | 2   4     35  | 357    57      9    |

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



Simple Colors: 3 (r1c4,r3c3,r5c6,r6c1,r7c5,r9c7) / (r6c4,r7c3,r8c9,r9c6) => r13c9,r8c1<>3