9 3 2 5
6 8 7
1 2 9
7 8 2 3
9
6 5 1 4
5 7 1
8 3 4
4 1 6 7
23-01-2017.......easy 23-01-2017
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9 3 4 6 7 1 8 2 5
2 5 6 8 3 4 7 1 9
1 8 7 2 5 9 6 4 3
7 9 1 4 8 5 2 3 6
3 4 2 7 9 6 1 5 8
8 6 5 3 1 2 9 7 4
6 2 9 5 4 7 3 8 1
5 7 8 1 6 3 4 9 2
4 1 3 9 2 8 5 6 7
8=>(1,7) | 8=>(3,2) | 1=>(4,3) | 5=>(4,6) | 9=>(9,4) | 2=>(9,5) | 2=>(6,6) | 8=>(9,6) |

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

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

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

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

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

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