8 6 7 4
6 7 3 1
5 6
4 2 5 1 6
9 4 6 8 1
8 3
4 3 2 5
9 3 5 8
24-09-2017.......medium 24-09-2017
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9 8 1 6 3 7 5 4 2
4 6 7 5 8 2 3 1 9
5 3 2 1 4 9 8 7 6
3 7 4 2 5 1 6 9 8
6 1 8 9 7 3 4 2 5
2 5 9 4 6 8 1 3 7
8 2 5 7 1 4 9 6 3
7 4 3 8 9 6 2 5 1
1 9 6 3 2 5 7 8 4
4=>(2,1) | 5=>(2,4) | 8=>(5,3) | 8=>(4,9) | 6=>(7,8) | 9=>(1,1) | 8=>(2,5) | 5=>(7,3) |

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

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

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

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

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

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