7 9 2 4
4 9 2 1
3 8 6 5
4 6 2 7
1 2 3 6
6 5 3 1
1 7 9 4
5 8 4 1
3 1 8 2
12-10-2020.......facile 12-10-2020
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7 6 9 2 1 5 4 8 3
8 4 5 9 7 3 2 6 1
2 3 1 8 4 6 9 5 7
3 5 4 1 6 2 7 9 8
1 2 7 4 9 8 5 3 6
9 8 6 5 3 7 1 2 4
6 1 2 7 8 9 3 4 5
5 7 8 3 2 4 6 1 9
4 9 3 6 5 1 8 7 2
1=>(1,5) | 3=>(4,1) | 2=>(3,1) | 4=>(9,1) | 1=>(3,3) | 5=>(2,3) | 3=>(2,6) | 4=>(3,5) |

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

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

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

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

7=>(8,2) | 9=>(8,9) | 7=>(9,8) | 8=>(1,8) | 9=>(9,2) |