7 4 2 1
9 1 7 8
6 5 2 4
6 4 1 5
1 6 8 3
4 7 3 2
2 9 6 4
1 5 9 7
26-08-2018.......hard 26-08-2018
www.daily-sudoku-puzzle.com

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

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

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

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

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

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

2=>(6,5) |