4 6 7 5
1 5 3 2 4 7
1 8 9 5
6 2 1 9
7 4 6 1
8 9 7 4 5 2
7 5 3 6
05-08-2017.......hard 05-08-2017
www.daily-sudoku-puzzle.com

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

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

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

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

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

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

9=>(2,5) |