6 2 8 7
3 6 2
9 7 1
2 9 5
9 4 3
1 3 7
8 7 2
6 5 4 9
17-09-2017.......medium 17-09-2017
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6 1 2 8 9 3 5 7 4
7 5 3 4 1 6 8 9 2
4 8 9 2 5 7 1 6 3
3 7 8 6 2 4 9 5 1
5 2 6 9 7 1 3 4 8
1 9 4 5 3 8 6 2 7
9 4 1 3 6 2 7 8 5
8 3 5 7 4 9 2 1 6
2 6 7 1 8 5 4 3 9
9=>(7,1) | 2=>(3,4) | 3=>(1,6) | 5=>(8,3) | 7=>(9,3) | 9=>(2,8) | 7=>(5,5) | 2=>(7,6) |

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

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

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

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

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

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