8 3 6 5
9 4 2 1
7 5 9
2 9 5
3 1
9 8 1
2 9 4
6 9 7 8
7 8 1 6
15-12-2018.......hard 15-12-2018
www.daily-sudoku-puzzle.com

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

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

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

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

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

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

7=>(7,7) | 7=>(2,4) | 7=>(6,6) |