2 7 9
4 1
9 7 6 8
5 1
7 9 1 2 3 4
6 7
6 3 2 5
8 1
9 6 7
28-02-2017.......medium 28-02-2017
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2 1 4 8 7 3 5 9 6
8 6 3 4 9 5 1 7 2
9 5 7 2 1 6 8 4 3
4 3 5 6 8 7 9 2 1
7 8 9 1 5 2 3 6 4
6 2 1 9 3 4 7 5 8
1 7 6 3 4 9 2 8 5
5 4 8 7 2 1 6 3 9
3 9 2 5 6 8 4 1 7
3=>(2,3) | 7=>(2,8) | 8=>(5,2) | 1=>(3,5) | 6=>(4,4) | 6=>(5,8) | 5=>(1,7) | 4=>(9,7) |

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

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

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

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

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

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