5 7 9 8 6 3
6 9 7 5
8 4 7 3
3 9 4
1 3 2 9
8 4 2 7
2 6 1 4 5 8
23-04-2018.......medium 23-04-2018
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2 5 7 9 4 8 6 3 1
1 8 3 7 6 5 2 9 4
6 9 4 2 1 3 8 7 5
9 6 8 4 5 7 3 1 2
5 3 2 6 9 1 7 4 8
4 7 1 3 8 2 9 5 6
8 4 9 5 3 6 1 2 7
7 1 5 8 2 9 4 6 3
3 2 6 1 7 4 5 8 9
8=>(2,2) | 6=>(4,2) | 2=>(3,4) | 8=>(3,7) | 9=>(4,1) | 4=>(6,1) | 7=>(5,7) | 1=>(7,7) |

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

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

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

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

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

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