7 1
4 9 2 6
3 5 2
4 8 7 9
1 5
6 9 1 3
3 6 1
9 5 4 3
8 2
25-09-2017.......medium 25-09-2017
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8 2 5 7 6 9 1 3 4
4 7 9 1 2 3 8 6 5
3 6 1 5 4 8 2 9 7
5 3 4 2 8 7 6 1 9
9 1 2 6 3 4 7 5 8
6 8 7 9 1 5 3 4 2
2 5 3 4 7 6 9 8 1
7 9 6 8 5 1 4 2 3
1 4 8 3 9 2 5 7 6
9=>(5,1) | 1=>(3,3) | 3=>(4,2) | 3=>(1,8) | 1=>(4,8) | 6=>(4,7) | 5=>(6,6) | 6=>(8,3) |

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

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

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

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

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

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