6 4
5 3 7 9
3 1 6
6 8 1
1 9 5
1 2 3 7
2 4 8
6 7 4 1
8 3
12-04-2014.......hard 12-04-2014
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7 2 9 6 1 4 5 8 3
8 5 6 3 2 7 1 9 4
3 1 4 5 8 9 7 2 6
5 9 3 7 6 8 2 4 1
2 6 7 4 3 1 9 5 8
4 8 1 9 5 2 3 6 7
9 7 2 1 4 6 8 3 5
6 3 8 2 7 5 4 1 9
1 4 5 8 9 3 6 7 2
6=>(2,3) | 2=>(4,7) | 1=>(7,4) | 3=>(5,5) | 6=>(7,6) | 6=>(6,8) | 6=>(9,7) | 1=>(9,1) |

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

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

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

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

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

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