4 2 9 5
8 9 7
5 1
2 6 3 1 4
1
2 1 9 4 5
3 6
3 8 2
1 7 5 6
07-11-2019.......hard 07-11-2019
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6 4 3 8 2 1 9 7 5
8 1 5 6 9 7 4 2 3
2 7 9 5 3 4 6 8 1
9 5 8 2 6 3 1 4 7
4 3 6 7 1 8 2 5 9
7 2 1 9 4 5 8 3 6
3 8 2 1 7 6 5 9 4
5 6 4 3 8 9 7 1 2
1 9 7 4 5 2 3 6 8
2=>(3,1) | 1=>(2,2) | 3=>(3,5) | 4=>(9,4) | 8=>(5,6) | 7=>(7,5) | 7=>(5,4) | 2=>(9,6) |

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

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

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

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

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

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