6 8 9 7
4 2 5 6
7 9
8 3 6 1
9 2
3 5 2 8
5 4
2 9 4 5
7 6 1 3
11-05-2017.......medium 11-05-2017
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6 3 2 8 4 9 5 1 7
1 4 9 2 7 5 3 6 8
5 8 7 1 6 3 9 2 4
2 7 8 3 9 6 1 4 5
9 5 1 4 8 7 6 3 2
4 6 3 5 1 2 8 7 9
3 1 5 7 2 8 4 9 6
8 2 6 9 3 4 7 5 1
7 9 4 6 5 1 2 8 3
9=>(2,3) | 7=>(2,5) | 3=>(2,7) | 6=>(3,5) | 3=>(3,6) | 2=>(1,3) | 2=>(4,1) | 7=>(7,4) |

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

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

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

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

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

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