Sudoku: Difference between revisions

Two more examples, from [http://www.7sudoku.com/very-difficult here] ans [http://www.extremesudoku.info/sudoku.html there].

<lang stata>a=7,9,.,.,.,3,.,.,2\

.,6,.,5,1,.,.,.,.\

.,.,.,.,.,2,.,.,6\

.,.,.,8,.,1,.,4,.\

.,.,.,.,.,.,1,.,3\

5,.,.,.,2,.,.,.,.\

.,.,.,.,.,.,.,7,4\

.,.,1,.,.,.,.,6,5\

.,.,8,.,9,7,.,.,.

sudoku(a)

a

1 2 3 4 5 6 7 8 9

+-------------------------------------+

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

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

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

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

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

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

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

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

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

+-------------------------------------+

a=.,.,4,1,.,.,.,.,9\

.,9,.,.,8,.,.,6,.\

6,.,.,.,.,3,7,.,.\

5,.,.,.,.,2,8,.,.\

.,4,.,.,3,.,.,2,.\

.,.,1,8,.,.,.,.,5\

.,.,2,5,.,.,.,.,3\

.,8,.,.,7,.,.,1,.\

7,.,.,.,.,1,4,.,.

sudoku(a)

a

1 2 3 4 5 6 7 8 9

+-------------------------------------+

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

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

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

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

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

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

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

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

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

+-------------------------------------+</lang>