3 2 8 4
9 2 5 3
7 9 1 2
8 4 5 3
1 6 7 5
3 6 2 8
4 7 3 5
5 1 9 3
7 2 9 4
18-03-2019.......facile 18-03-2019
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3 1 2 8 5 6 4 9 7
8 9 6 2 7 4 5 1 3
4 7 5 9 3 1 6 2 8
7 2 8 1 4 5 3 6 9
1 6 4 3 9 8 2 7 5
9 5 3 6 2 7 8 4 1
2 4 9 7 8 3 1 5 6
5 8 1 4 6 9 7 3 2
6 3 7 5 1 2 9 8 4
1=>(1,2) | 1=>(2,8) | 3=>(9,2) | 2=>(4,2) | 5=>(6,2) | 3=>(3,5) | 4=>(2,6) | 6=>(3,7) |

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

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

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

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

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