3 9 8 7
2 1 7 8 5 9
6 2
9 3
6 7 1
4 6
9 1
4 2 8 1 9 3
1 5 4 8
02-04-2017.......hard 02-04-2017
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3 5 9 1 2 4 8 6 7
4 2 1 7 6 8 5 9 3
6 7 8 5 3 9 1 4 2
5 1 7 9 8 3 6 2 4
8 6 4 2 7 5 3 1 9
2 9 3 4 1 6 7 8 5
9 8 6 3 4 7 2 5 1
7 4 2 8 5 1 9 3 6
1 3 5 6 9 2 4 7 8
5=>(1,2) | 4=>(2,1) | 7=>(8,1) | 9=>(6,2) | 4=>(3,8) | 6=>(7,3) | 1=>(3,7) | 9=>(5,9) |

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

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

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

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

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

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