4 5 1
1 7 8 2 3
6 9 4 5 8
7 8 9
9 8 7 5
6 4 2
9 1 3 6 4
2 4 1 9 5
3 9 8
10-07-2018.......easy 10-07-2018
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8 4 3 7 6 5 2 1 9
1 5 7 8 9 2 4 6 3
6 2 9 1 3 4 5 7 8
7 6 2 5 8 9 3 4 1
4 9 8 2 1 3 7 5 6
3 1 5 6 4 7 8 9 2
9 7 1 3 5 8 6 2 4
2 8 6 4 7 1 9 3 5
5 3 4 9 2 6 1 8 7
7=>(1,4) | 2=>(1,7) | 8=>(1,1) | 5=>(2,2) | 2=>(3,2) | 4=>(2,7) | 3=>(3,5) | 6=>(8,3) |

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

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

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

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

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