6 1 3 7
4 5 7 6
9 8 6 1
6 4 3 2
3 5 2 1
1 5 6 9
3 2 8 7
6 5 1 8
5 8 7 3
23-09-2016.......facile 23-09-2016
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6 2 8 9 1 4 5 3 7
4 5 1 7 2 3 8 6 9
7 3 9 8 5 6 1 4 2
8 7 6 1 4 9 3 2 5
3 9 4 5 8 2 6 7 1
2 1 5 3 6 7 9 8 4
1 4 3 2 9 8 7 5 6
9 6 7 4 3 5 2 1 8
5 8 2 6 7 1 4 9 3
2=>(1,2) | 5=>(1,7) | 1=>(7,1) | 1=>(2,3) | 3=>(3,2) | 5=>(3,5) | 9=>(2,9) | 5=>(4,9) |

8=>(4,1) | 6=>(9,4) | 3=>(6,4) | 2=>(6,1) | 6=>(5,7) | 9=>(7,5) | 8=>(5,5) | 4=>(6,9) |

6=>(7,9) | 8=>(1,3) | 7=>(3,1) | 9=>(8,1) | 3=>(2,6) | 8=>(2,7) | 4=>(7,2) | 2=>(2,5) |

2=>(3,9) | 4=>(3,8) | 1=>(4,4) | 4=>(8,4) | 7=>(5,8) | 9=>(5,2) | 3=>(8,5) | 7=>(6,6) |

8=>(6,8) | 5=>(7,8) | 9=>(9,8) | 1=>(9,6) | 4=>(1,6) | 9=>(1,4) | 7=>(4,2) | 4=>(5,3) |

7=>(8,3) | 2=>(9,3) | 9=>(4,6) | 4=>(9,7) | 2=>(8,7) |