5 6 9 4
4 9 3 7 6 8
8 1 2 7 6
4 5 8 3 9
6 7 2 4 9 5
8 4 5 3
10-06-2020.......medium 10-06-2020
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7 2 6 8 3 4 5 1 9
8 5 1 6 7 9 3 4 2
4 9 3 2 5 1 7 6 8
9 3 8 1 2 7 6 5 4
5 1 7 9 4 6 8 2 3
2 6 4 5 8 3 9 7 1
6 7 2 3 1 8 4 9 5
1 8 9 4 6 5 2 3 7
3 4 5 7 9 2 1 8 6
9=>(1,9) | 8=>(2,1) | 4=>(9,2) | 3=>(4,2) | 2=>(3,4) | 5=>(3,5) | 4=>(4,9) | 5=>(4,8) |

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

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

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

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

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

2=>(5,8) | 8=>(5,7) | 7=>(6,8) |