4 5 7 6
9 3 1 5
5 9 1
3 1
6 9 7 3
7 8
8 6 3
1 7 4 2
3 8 2 4
29-10-2016.......difficile 29-10-2016
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3 4 1 5 2 7 9 6 8
9 7 6 3 8 1 4 2 5
2 5 8 4 9 6 3 1 7
8 2 3 6 7 9 1 5 4
6 9 4 1 5 8 2 7 3
5 1 7 2 4 3 8 9 6
4 8 2 9 6 5 7 3 1
1 6 9 7 3 4 5 8 2
7 3 5 8 1 2 6 4 9
1=>(1,3) | 1=>(6,2) | 2=>(4,2) | 7=>(2,2) | 6=>(8,2) | 7=>(4,5) | 3=>(6,6) | 3=>(8,5) |

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

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

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

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

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

4=>(5,3) | 5=>(5,5) | 4=>(6,5) |