8 9 7
5 3 2 8 1
9 8 1 4
1 8
1 5
7 6
6 3 2 7
2 8 4 3 5
4 8 2
18-04-2017.......medium 18-04-2017
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8 2 1 4 9 3 6 5 7
5 4 3 6 2 7 8 9 1
6 7 9 8 5 1 4 2 3
1 6 2 9 7 4 5 3 8
3 8 4 1 6 5 2 7 9
7 9 5 2 3 8 1 4 6
9 5 6 3 1 2 7 8 4
2 1 8 7 4 9 3 6 5
4 3 7 5 8 6 9 1 2
3=>(5,1) | 6=>(3,1) | 9=>(7,1) | 9=>(2,8) | 3=>(3,9) | 7=>(9,3) | 8=>(5,2) | 1=>(7,5) |

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

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

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

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

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

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