7 1 4 8
8 6 3 7 9
9 7 8 5
2 6 7 4
4 5 3
5 3 4 9
2 6 1 4
8 6 7 9 2
5 9 1 7
02-02-2019.......easy 02-02-2019
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7 1 5 6 9 2 4 3 8
4 8 6 3 1 5 2 7 9
9 3 2 7 8 4 1 5 6
1 9 8 2 3 6 7 4 5
6 7 4 1 5 8 3 9 2
2 5 3 4 7 9 8 6 1
3 2 7 9 6 1 5 8 4
8 6 1 5 4 7 9 2 3
5 4 9 8 2 3 6 1 7
3=>(1,8) | 3=>(7,1) | 4=>(2,1) | 1=>(4,1) | 3=>(3,2) | 5=>(1,3) | 2=>(3,3) | 5=>(2,6) |

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

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

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

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

6=>(5,1) | 2=>(6,1) | 2=>(5,9) | 1=>(6,9) |