6 2 7
7 4 3 2 8
5 9 6 1
3 9 5 7
6 4 1
4 3 8 1
6 3 5 2
5 2 6 1 4
9 5 3
16-01-2018.......easy 16-01-2018
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6 1 2 8 5 4 7 3 9
9 7 4 1 3 2 8 5 6
8 5 3 9 7 6 4 1 2
3 9 1 5 2 8 6 7 4
2 8 7 6 4 1 3 9 5
5 4 6 7 9 3 2 8 1
4 6 8 3 1 5 9 2 7
7 3 5 2 6 9 1 4 8
1 2 9 4 8 7 5 6 3
8=>(3,1) | 9=>(2,1) | 1=>(2,4) | 5=>(1,5) | 7=>(3,5) | 3=>(3,3) | 1=>(4,3) | 8=>(4,6) |

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

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

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

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

5=>(5,9) | 9=>(5,8) | 8=>(9,5) | 7=>(7,9) | 2=>(9,2) | 8=>(5,2) |