2 1 7 4
6 1 2 7
7 8 1 5 2
5 6 8 4
4 5 2
1 2 3 9
6 8 4 2 5
3 8 6 9
5 3 2 8
05-10-2017.......medium 05-10-2017
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3 5 2 1 9 7 4 6 8
4 6 1 8 2 5 9 7 3
7 9 8 4 3 6 1 5 2
5 2 9 6 7 8 3 1 4
8 4 3 9 5 1 7 2 6
1 7 6 2 4 3 5 8 9
6 8 4 7 1 9 2 3 5
2 3 7 5 8 4 6 9 1
9 1 5 3 6 2 8 4 7
5=>(1,2) | 2=>(8,1) | 4=>(2,1) | 8=>(5,1) | 9=>(9,1) | 9=>(3,2) | 1=>(9,2) | 2=>(4,2) |

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

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

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

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

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